Cave-Man is an sexual act done buy a male. To peform this act one must be nude and in a private place, then you would need to tuck you cock and balls or ball and hold your legs together so it looks like there is nothing there. The next step is to call a female (young girl, girl, landy or a old women) into the room, and when she sees you she should be willing to bed with you. its worked for the pasted 10,000 years so why stop now