Having been the high-libido partner in relationships with low-libido people, I would sympathize with this man's initial situation if he weren't so clearly an entitled irresponsible twit.

But this letter isn't "Despite lack of affection I had decided to stay married so that my kids would grow up in a stable home, but I wasn't sufficiently discreet in seeking an occasional partner" or "when my girlfriend got pregnant, I had a difficult choice to make between staying near my children from my first marriage or moving to be near my new child; I decided to move, but in retrospect that harmed my older children"(1). It's "I deserve to have sex and I'm annoyed that I'm experiencing consequences from having sex". To which I say, tough shit, sir; one can live without sex even when one is so horny that one's thinking "I want to do them" about anyone remotely attractive.

(1) "I had to move out of state for her"??? Yeah, I'm not buying that without more detail.