using them as in peeing them, not using to fuck or something
Wait, how would sex in that even work?
You know what, don’t tell me. I’m probably better off not knowing.
One of my stories (Magdalena’s Lovers) has a character masturbating with a diaper on. Not my usual kink, but it was mentioned by the guy who requested the story. I basically just had him pressing on the diaper and rubbing.