A fetish in which the idea of impregnation, or the risk of it, is a source of arousal. The focus is on the fantasy and the taboo, not on an actual desire to conceive.
For many people the appeal sits in the risk and the feeling of being claimed or claimed completely, which is why it shows up heavily in dirty talk and roleplay scenes even when both partners have no intention of making a baby. Some lean into it during sex with no birth control between trusted partners, but most keep it purely verbal.
Worth knowing: If someone wants to act out the risk with real fluid contact, contraception and STI status need to be discussed honestly beforehand, and a safe word matters because the pressure of the scene can push people past what they actually agreed to.
Also called: creampie kink, breeding fantasy, impregnation fetish, risk play, primal play overlap, cum play