I'm sure this was already a thing, I really doubt in the first to think of it but I just got this idea in my head tonight and it was amazing. My husband works long nights and I was feeling it tonight, of course with him not here, but I didn't want to just do vibrater/clit and I don't own a dildo. I got a condom and filled it with warm water, not bursting full, just enough that it was penis shaped and tied off. Oh man. Just holding it in the was pleasurable and the O was great. It didn't burst and I don't think it leaked either.