Why is that? Oh maybe cause my cock was stiff when I fucked your mom and donkey punched her!!!
Many moons ago we busted on one another by using "the sister" threat, you know "I fucked you sister" "your sister blew me" so on and so forth; when did it change to "mother shit" we always knew that a mother was off limits, now it seems to be the norm, am I really that fucking old! Fuck, I hate you young bastards!