my wife always wanted to finger my butt and watch me jack-off while she has her finger inserted......she didn't realize it but she was masaging my prostate---male-G spot, it felt so good I shot a load and almost hit her in the face with it....but she has only done that a couple of times---she wanted to try the strap-on, but we haven't, and may not, I like to do the driving and drilling------wasn't sure what size she had in mind----the finger is a lot smaller then some of the strap-on's.