I still masturbate. I can have sex, let the gf pass out, go downstairs, play a game, get bored, watch some youporn.com, spend some 'quality time', etc. As a matter of fact, the more I have sex, the hornier I get. Quite often leading to more 'self-manipulation'. (I like to use that term, it sounds worse, lol) Apparently, you're lacking in sex drive. Alot, since a middle aged, out of shape man's is higher than yours.