Well, you've gotten great advice from everyone who's responded, so I'm just going to add one small thing: take the dog into the vet and get him swabbed. Due to the act that occurred, it is possible the dog may have picked up an infection.
There are some "bugs" we humans carry in our lower digestive tracts that can cause genital infections or UTIs in dogs. You don't have to give details, just tell the vet that the dog has been licking himself excessively or has been urinating frequently in small amounts NOT related to marking.
The vet will check the dog visually, swab him if they think it's necessary, and probably put the dog on a course of antibiotics.
As regarding Sal, I think deep down inside, you realize that these "predelictions" of his mean that he won't be able to live in a home environment with animals OR vulnerable humans.
I'm very sorry
