Seeking Any recommendations for games with sex as a main gameplay element?

[Dickard]

As some examples, games like Rack where the whole point of the game is doing kinky sex science on people, or Hole Dweller where romancing the girls then fucking and impregnating them is part of the main gameplay loop.
As opposed to games that are just "X genre with sex tacked on" or games where the only sex scenes are when you lose.