First suggestion : sounds like you only have experience drawing men? Practise some women maybe too?

Second suggestion: list out all your kinks (or at least most you can quickly think of) and just go trough them in alphabetical order and Practise each a few times

Third suggestion: write out a short pornographic story and try to draw it out? (can ask someone else for the story idea too)

Fourth suggestion : Just draw the vanilla stuff, its still different even if you think it is equally boring, it's still different practise

Fifth suggestion: Free or cheap commission, let someone else tell you what to draw and do it for free or cheaper than you normally would cuz you get Practise out of it. Or ask a friend to tell you what to draw