Did it once with an ex-girlfriend. Surprised me while I was sitting, and she sat on my lap, didn't use lube, hurt like hell, but went with it. Once past the splinter, it was all warm/squishy and didn't feel as tight as pussy. After a few minutes we stopped because of the pain. Really wish she didn't surprise me, and I would have gone to get some lube or at least eaten her ass out first. She was petite and had a bobcut like ayanami rei, still talk to her and she comes over for some fun sometimes but never tried it again after that, but I want to try it again with a new gf sometime soon or maybe convince her to try it again lol. Love my jazzebell woman.