It's an area where there's a fine line between mutually consensual erotic play, and borderline domestic abuse. You have to be very precise with your search terms on the net or you see stuff that ought to be illegal, and is straight out abuse in my opinion. And you wonder if the women that say they like that, are under the same condition that has some abused women trying to stand up for and support the abuser. I love the idea of a playful smack on the arse, and accept that some women in perfectly normal relationships might actually like to be "punished" or spanked for something they feel they've done, but I think I'd have trouble going past a playful smack or two. But I guess I'll never know, as I'm never going to be in that position with my wife's disinterest in anything like it.