My late wife used to stuff my dick up her ass while she was riding cowgirl, and then get off telling me what she was doing. She'd say "I put it up my ass, can you tell?" I'd say, oh yeah, and just rail her for it. She'd get stuck on it, it was so hard. I wouldn't let her take it out until I filled her ass with cum. What a mess it made running out after I ripped it back out.