I bet you didn’t know this. According to NYMag,
Some people are super into ghost sex as a fetish, as evidenced by the online communities you can find dedicated to ghost erotica. But there’s also the phenomenon of ghost rape, when people feel they’ve been assaulted by spirits against their will. Folklorist David J. Hufford believes that up to 15 percent of people “experience being assaulted in their sleep by an unknown entity at some point in their lives.” Even with ghosts, there’s the issue of consent — while some people actively try to summon demons to do it with, others say ghosts have groped them without the okay.
So don’t be afraid – as far as we know, you can’t make a ghost baby!