When I play a season in Fifa Football and I lose an important game like a final or something like that, I can be depressed all day, and even deny sex to my girlfriend due to it (obviously I don't tell her it's because of that but I know it).
Talking about sex, and on the other hand -- not sure if it's a coincidence or not-- the best sex we had was when I won the Champions League after beating Chelsea 3-0.