I have been fortunate to enjoy this gift from several providers. For a lot of them, I think it is a ymmv activity and most of those probably do it for your pleasure, not their own. However, two that come to mind that seem to enjoy it as much as I do are Aliesha and Anhellica. I get the impression, with them, you would have to ask them not to.
Some of my favorites at TUMA include Kendell4U, Laura Lynn, Vivian Rose, Asian Champaign, Miki. Several have mentioned they appreciate me being shaved . I have never asked for it. It is always just given. But one of my favorite activities. I do shave balls and ass just to be extra clean.
Man I don't know how some of you guys do it. I'm fairly young, I've always been in pretty good shape, no belly to speak of, and I think it would be impossible for me to manipulate my body around or down or however the hell ya do it to shave the crack of my ass. Yea I can hit the taint no problem, but to spread the cheeks and be able to run a razor right down the middle main street, with all the different angles to get in the nooks would be difficult. And if I was packin an extra 50 lbs or so, there's no way. I would have to have some help.
There's an idea. Would it be odd to ask a lady to help out with a little manscaping and make the ole ass crack slick as a whistle?