Meh, it's just one of the field hazards of bangin' her in the backdoor, it happens. But that's where using lots of lube really pays off, it kind of creates a slick shield for your cock, nothing seems to stick. Kind of like using a good wax on your car or truck, and then when it rains the water and dirt just beads right off.
On a serious note, speaking of the south side, maybe I have just been with too many freaks, but I swear nothing gets a girl going while you're down there licking her and fingering her like sliding a finger in her ass at the same time. Again, maybe I have just hooked up with only freaks (including the one I am married to), but I swear every girl I have ever done that to went from really into it, to REALLY REALLY into it within 5 seconds of fingering her ass. You just gotta make sure "tha butthole" is lubed (however you need to accomplish that) and work your way in slowly. It's the magic button, the rest of the sex from there is almost anything goes porn quality sex.
So in that respect, I would say "tha butthole" is not overrated as it may not do a whole lot for some guys, but it sure as heck has turned some seemingly tame girls I have been with into freaks.