What about latent gay men who aren't attracted to women really but are trying very hard to prove they aren't homosexual by showing themselves how heterosexual they are by having many affairs ----but since women don't really appeal to them deep down, they need viagra. They don't really love women ---they just pretend ---so they can murder one.
I've wondered if he originally needed the viagra in order to impregnate Laci.
I've been also wondering along the lines of your #109 comment, in regards to Scott...