A sound like that is always a little unnerving and an operating table and a long row of gleaming instruments flashed evanescently across my mind. I wondered how bad it was and if Martian hospitals were well-equipped, and had just the right facilities to take care of an emergency case requiring major surgery.

But he'd said I was out of danger, hadn't he ... that I didn't even need more sedation? Sure he had. I'd been stabbed with a poisoned dart, but that didn't mean I'd have to go on the operating table. They would never have let the dart stay inside me. If an operation had been needed, it would have been performed immediately....

Perhaps it had. Well, to hell with it. I was out of danger now and beginning to mend and that was the only thing that counted. It had been touch and go, she'd said. And Joan loved me so much that....

Hold on tight to that, Ralphie boy. It's the best news you'll ever hear, even though you knew it all along, were sure of it on the day you married her. What they didn't know and would have to guess about was the feeling of oneness we had whenever we were together.

I let that ride too, sweet as it was to dwell upon, and thought about how mistaken I'd been about the doctor. He wasn't the kind of guy I'd thought him. The "nurse this, nurse that" talk had been either a performance, put on for my benefit just in case I was a little more than semiconscious or—a routine, quickly-dropped formality.

The second supposition seemed the most likely. A kind of ritual they went through from habit, and because it's more ethical to keep a doctor-nurse relationship on a formal plane when the patient is under clinical scrutiny. After that, they could relax and be human.

I had no complaint, because I liked both aspects of Gruff Voice's personality. That I liked the nurse goes without saying, not only because of what she'd said about Joan, but because of a certain something....

All right. Gruff Voice had said that he was susceptible beyond the average and so was I. A sweet soft woman bending over you, denying herself sleep just to make sure you'll stay alive, doing her best to ease your pain, sort of ... does things to you. It had nothing to do with the way I felt about Joan. It wasn't actual disloyalty ... didn't come within a mile of disloyalty. It was just the man-woman absurdity she'd mentioned, only ... it wasn't an absurdity and never had been.

It may be a hard thing for a woman to understand, sometimes. But it's never hard for a man to understand, if he's honest with himself and knows just how powerful the mating impulse can be in human beings. Call it sex attraction if you want to, but when you've called it that it's important to remember that the mating impulse is the basic, anthropological prime mover. Sex is simply its modus operandi. On Earth and on Mars, whenever a normal man and a normal woman are in close proximity, even for ten or twelve seconds, the mating impulse starts unwinding. On another planet of another star the modus operandi may not be sex as we know it, but something quite different, if you can imagine another way of choosing a mate, building a home, and filling it with healthy, happy children.

It's a coiled-spring, trigger-mechanism kind of impulse and neither the man nor the woman have to be attracted to each other on the personality level, unless you want to be technical and regard the purely physical as an attribute of personality. They can be young or old, plain or good looking. Some attraction will be present, even under the most adverse circumstances. But when the woman is young and beautiful and the personality level warm and appealing you'll be deceiving yourself if you think the impulse can be kept from arising just because you already have a mate you're desperately in love with.