Bodies visibly change from one sex to another, with tits growing or shrinking, hips shifting, and a cock or pussy forming where it wasn’t before. The art usually lingers on the in-between moments like swelling nipples, sudden erections, and characters reacting in shock or horny confusion. A lot of scenes turn sexual fast, with the newly changed body getting tested by masturbating, fucking, or being fucked to “prove” what it can do now.