Most of my married friends have experienced the massive drop-off, and none of them are soft, beta types. Before they married, they ran through tons of pussy. They loved fucking, and got chicks to do freaky shit with them (not necessarily rimming though...HA HA!). ALL of them suffered through dry spells that went for several weeks to months. All tried to get at their wives, but at some point gave up because they got tired of being rejected. My own cousin went through it with his first wife, who didn't like his work situation (he was a film maker and ran his own artist management company). When things got tight for him, she wasn't supportive, and the first thing that goes is the sex. Before they were married, it was sex at the drop of the hat. She even overlapped with another chick he was banging, and they KNEW about each other. Once married, when they aren't right emotionally for whatever reason, you get NO affection. And there will always be something that they're upset about. All of these guys were used to getting steady sex, but then had to settle for scraps that she decided to throw out of occasional pity.
"The best kind of pride is that which compels a man to do his best when no one is watching."