Robert Silverberg - The Trouble with Sempoanga

When Helmet Schweid decided to go to Sempoanga for his holiday, he knew the risks, but of course he assumed they didnt apply to him. Youll pick up a dose of zanjak and never get out of quarantine, his friends told him. Helmet laughed. He was a careful man, especially with his body. He would avoid getting zanjak by avoiding going to bed with women who had zanjak: that was simple enough to manage, wasnt it?

By common agreement Sempoanga was the most beautiful planet in the galaxy. See one sunrise on Sempoanga, everyone said, and you wont care if you never see anything else anywhere. The trouble with Sempoanga was the dismal parasite its humanoid natives harbored. There was only one way to transmit that parasiteby making love. Since the natives of Sempoanga are a good deal less attractive to humans than its sunrises, it is not easy to understand how any human could ever have caught it, but somehow someone had, and it had adapted nicely to human bodies, thriving and multiplying and making itself remarkably contagious, and in the past few years a good many human visitors to Sempoanga had passed it around to one another, with horrendous results. Biologists were working on a cure and hoped they might see results in just a few more years. But meanwhile no one went home from Sempoanga without undergoing tests and if you caught zanjak, you stayed quarantined there indefinitely, because the parasites effect on the human reproductive system was so startling that the future of the entire species might be in jeopardy if it were allowed to spread to the other civilized worlds.

For his first few days on Sempoanga Helmut was so busy experiencing the gorgeous planet itself that he was in no danger of catching any kind of venereal disease, neither the old standbys nor the exotic local specialty. His own world, Waldemar, was a frosty place with a planetwide winter for three-quarters of the year, and on Sempoanga he erupted with great gusto into eternal tropical summer. From dawn to midnight he toured the wondersHargillin Falls, where the water is the color of red wine, and Stinivong Chute, a flawless mountain of obsidian at the edge of a lake of phosphorescent pink gas, and The Bubbles, where subterranean psychedelic vapors percolate upward through a shield of porous yellow rock with delightful effect. He ran naked through a grove of voluptuous ferns that wrapped him in their fleshy fronds. He swam in crystalline rivers, eye to eye with vast harmless turtles the size of small islands. And each night he staggered back to his hotel, wonderfully weary, to collapse into his solitary sleep-tube for a few hours.

But after those early greedy gulps of natural marvels, his normal social instincts reasserted themselves. On the fourth day he saw a striking-looking radium-blonde from one of the Rigel worlds at the gravity-ball court. She met his tentative grin with a dazzling one of her own and quickly agreed to have dinner with him. Everything was going beautifully until she excused herself for a moment late in the meal, and the waiter who was bringing the brandies paused to whisper to Helmut, Watch out for that one. Zanjak.

He was stunned. Was she trying to hide it from him, then? No, give her more credit than that: as they strolled through the garden under the light of the five moons she said, Id like to spend the night with you. But only if youre already carrying. I am, you know. So that was that. He walked her to her room and kissed her sadly and warmly goodnight, and trembled for a moment as her soft elegant body moved close against his; but he managed to escape without doing anything foolish.

The next night, sitting alone in the hotel cocktail lounge and beginning to feel more than lonely, he noticed another woman noticing him. She was dark-haired and long-legged and perhaps two or three years younger than he was. They exchanged glances and then smiles and he tapped his empty glass and she nodded and they rose and went to the bar and ritualistically bought each other drinks. Her name was Marbella and she had been on holiday here since last month, escaping from a collapsed six-group on the planet of Tlon. The divorce is going to take years, she told him. Its a universal-option planet, the six of us come from four different worlds and everybodys home-world laws apply, some of the lawyers arent even human

And you plan to hide out on Sempoanga until its all over?

Can you imagine a better place?

Except for

Well, yes, theres that. But every paradise has its little snake, after all. Quickly she shifted topics. I saw you this morning at the puff-glider field. You looked like you wanted to try it.

How is it done? he asked. Helmut had watched hotel guests clambering into huge fungoid puff-balls, which immediately broke free of their moorings and went drifting out across golden Lake Mangalole in what looked like guided flight.

Would you like me to teach you? Its a matter of controlling the puffers hydrogen-synthesis. Stroke it one way and it gets more buoyant, another and it sinks. And you learn how to ride the thermals and all. Where did you say you were from?

Waldemar.

Brr, she said. Are you free for dinner tonight?

He liked her forthright, aggressive ways. They arranged to meet for dinner and to try the puff-gliders in the morning. What might happen in between was left undiscussed, but once again Helmut found himself confronting the problem of zanjak. She had been here more than long enough to pick up an infection, and, coming out of a turbulent marriage, it was hardly likely that she had been chaste in this sensuous place. On the other hand, if she did carry the parasite, she would certainly tell him about it ahead of time, as the other woman had. There was bound to be an etiquette about such things.

Over dinner they spoke of her complex marriage and his simpler, but ultimately just as disastrous, one, and briefly of his work and hers and of his planet and hers, and then of the splendors of Sempoanga. He liked her very much. And the gleam in her eyes told him he was making the right impression.

When he invited her to his room, though, she turned him downwarmly and graciously and with what seemed like genuine regret, explaining that this was the last night of her five-day contraceptive holiday; she was fertile as a mink just now and feared giving way to temptation. She seemed sincere. Therell be other nights, you know, she said, and her smile left him with no doubts.

In the morning they met at the puff glider field and she taught him quickly and expertly how to control the great organisms. Within an hour they were off and soaring. They crossed the lake, landed on the slopes of jag-toothed Mount Monolang for a lunch of sun-grilled fish and wineberries and ran laughing toward a glistening stream for a dip. Later, when they lay sunning themselves on shelves of glassy rock, he studied her bare body as surreptitiously as possible for signs of zanjaksome swelling around the thighs, perhaps, or maybe little puckered red marks below the navel, anything at all that seemed irregular. Nothing visible, at any rate. The pamphlet on zanjak that the hotel had thoughtfully left beside his bed had told him there were no external symptoms, but he was uneasy all the same.

It would have been simple enough to drift into lovemaking on this secluded hillside, but his uncertainties held him back, nor did she try to take the initiative. Eventually they dressed and resumed their glider-journey. They halted again to visit a village of nativesflat-faced warty creatures with furry mothlike antennae, so ugly that Helmut wondered what sort of tourist could have been desperate enough to catch the original parasite from one of them