A 40 year old virgin that permanently resides in their parents basement and refuses to see the light of day due to their unusual disorders. Recent studies have revealed that a Simfac can suffer from Alien Hand Syndrome (this leads to chronic masturbation), Gender Dysphoria (GD), Fish Odour Syndrome, Necrophilia and Frotteurism.
Michael: "Dude, I swear I saw Simon at the shops today!"
Shayne: "That cant be possible, he is a known Simfac."