I have a friend, a bit on the flip-side that did the same. My college roommate was the biggest whore I've ever known, and a devout atheist. It wasn't uncommon for me to come home between classes and find him with one of the 3 different (and HOT) girls per day that he nailed, and then have to remind him later who they were (me: There's that hot girl X over there. him: Who? me: Remember? Last Thursday afternoon? him: Ooo, thanks for the heads-up. What's her name again?). Then there was the tripping over little gifts left in front of our door, slipping on used rubbers, or love letters/"thank you" cards, slid under the door by some little idiot that thought SHE was "the one", when I didn't pay attention going in and out of the room. He was a great looking guy, and very hung. I never saw it hard, but limp it was pretty meaty, and his first wife told me it was just huge once in passing, when we were joking about "enlarge your penis" spamming. (One odd aside, he was embarassed by his size and would not only wear briefs, but a pair of gym shorts, before putting on pants, to try to hide his bulge and definition. Limp in his briefs, it looked like my average one hard. I saw him over the holidays, and he's obviously given this habit up, from the bulge i saw when he and the 2nd Mrs. sat back on the couch.)
Anyway, instead of the typical 19yr old masterbating 3+ times a day, he fucked 3+ times a day (and more power to him), he often committed hugely disruptive and vulgar scenes at campus religious-based gatherings, as well as taunting anyone with any kind of belief, and used "fuck" and "cunt" more than most people use "the" or "and". Then... the CHANGE. He went all "nouveau Christian" and now gets all "holier-than-thou" when someone uses something as mild as "damn" in front of him, gets all serene when he expresses his pity for those that don't see the light, and is married to a horse of a woman that doesn't remotely compare to those he got in school.