I need to be chemically castrated.
Try having him take Lexapro. It worked for me. After about 4 weeks taking 20mg sex drive is almost gone. He will not have constant thoughts...
I am on Lexapro for anxiety issues and one of the side effects is a drastic reduction in sex drive. I can swear my penis is shrinking as well...
Being forced to swallow the results of an orgasm has worked for me. The orgasm itself has pleasure but the immediate aftermath no so much.