"I see," it said again, though Jerry was unaware of expressing any conscious thought. "It is clear to me now. You have suffered much—will suffer much. No hope for you, is there?" There was warmth in the words—warmth, friendship and compassionate understanding. Suddenly, to this mind of an alien in its incongruous, invisible baby's body, Jerry found himself blurting the things he had never told to any man. Things which no Space Zoologist had ever discussed even with another member of that hapless clan. "They never told us," he said to the alien. "I don't hold any rancor because of it; they dared not tell us, lest we refuse to become one with them. They were fair, though. Long before we were indoctrinated, long before we'd been allowed to attempt our first Contact, we were told that there were dangers. Not the dangers we had heard about, such as the imminent peril of dying if the host died while we were in Contact. Another danger was implied, one which we could only learn of by actually becoming Learners, and one which—once we had learned of it—would be impossible to escape. "With a little thought along the proper lines, we might almost have guessed it. For every action, there is an equal and opposite reaction. One of Newton's laws, applied in an area he did not even suspect existed. "Oh, we were a brave, adventurous lot, all of us. We would be Learners; no alien mind but we could enter it, and actually become the alien for the period of Contact. Thrills, danger and hairsbreadth escapes would be ours. Ultimate adventurers, they called us. And all along, we were fools." The alien refrained from comment, although Jerry could feel its mind waiting, listening, assimilating. "Contact had a drawback. A basic one which we might have guessed, if we hadn't been going around with stars in our eyes and a delightful feeling of superiority over the men who would never know the interior on any minds but their own. In Contact, just as in sunbathing, there is a delayed reaction, a kickback." "Sunbathing?" thought the alien. Jerry's mind swiftly opened for the alien's inspection his full storehouse of information on the subject. In an instant, the alien apprehended the fate that lay in wait for the careless Space Zoologist— "Sure is warm in here," said Bob, running a finger around inside his sweat-dampened uniform collar.