Sockomnia
Being sexually aroused by your father inlaws sock. Being kept awake at night by the thought of wanking into your father inlaws sock, whilst being rubbed on the back by your mother in law.
"you look tired today, Jim". "yeah, i've got Sockomnia, i've been awake all night thinking about having a wank in my father inlaws grubby sock, i'm shattered"