I've had exactly one lady offer and perform TUMA. It's not something I demand or seek out, but in this case it was glorious. To me it's about a deeper level of intimacy and expressing that (even though it's a fantasy world kind of intimacy) you *really* have a comfort level with your partner.
Few girls really get the technique of FUMA. Usually they spit and just jam it in there. Ass play needs to go slow, and I mean real slow.
Girls probably don't want to have TUMA on their reviews - it should always be YMMV. And most guys probably don't want to discover they actually like it.
Guys keep your assholes squeaky clean. Ya never know.