Inlay

You've got knife, blade, edge, wound, bruise, blood. What else do you need to make a sex scene work???

Writing opinions that may get you shot: I get that it's a bit of an in-joke now, but the idea of NEEDING a long list of synonyms for genitalia if you're writing erotica is so... If you're referring to them so much you need a dozen different words, you're probably writing the sex scene wrong.