There are times when I almost understand the motivation of men who are attracted to other men. Not that I understand it emotionally or sexually, I'm repelled by the thought. But practically speaking, strictly from a pragmatic point of view, there's something to be said for zero. Z.E.R.O. chance of "accidental" pregnancy.
Assuming, of course, we're talking about real biological men.
That's a stretch. All this guy had to do was avoid having sex with a woman other than his wife—he could have cut the risk in half right there; and being a nurse, he could easily have mastered the use of birth control.
Beyond than that lack of self-control in the primary situation, he went on to allow his lust, obsession, entitlement, and fraudulent use of hospital supplies to take over.