Sugarfreecandy has it for this one. I just wanted to add that as a guy, I love it when my wife is on top. She is sometimes reluctant since she says she is fat. (Overweight, yes. But I don't think she is fat.) Besides, I think she looks sexy and that's why I like her on top. It also provides me an easier opportunity to reach around and feel her ass, or let her drop a nipple into my mouth. It's nice to just touch her while she rides me. I say go for it, try different things and talk openly about what feels good and what is not so good. Have fun!