"The mannequins are not fitted with full simulation mechanics, so you will have to imagine the next part. Apparently it is a necessary procedure in proper courtship ritual. The man will kiss her ear, lick it, and promise his everlasting love. Traditionally, this causes the woman to go into heat." He looked sternly at the boy. "Do you understand this so far?" Gilbertus nodded. Somewhat to Erasmus's consternation, the boy displayed a detached curiosity with no uneasiness whatsoever, and no apparent urges of his own. "Next, the man will kiss her on the mouth. At this point both will begin to salivate heavily," Erasmus said in a professorial tone. "Salivation is a key element in procreation. Apparently kissing serves to make the female more fertile." The boy nodded, and half smiled. Erasmus took this to mean that he understood. Good! The robot began to rub the faces of the mannequins together, briskly. "Now this is very important," Erasmus said. "Salivation and ovulation. Remember those two concepts and you will have a basic grasp of the human reproductive process. After the kissing, intercourse begins immediately." He began to speak more rapidly. "That is all you need to know about human copulation. Do you have any questions, Gilbertus?"