A boy in his youth ran into his house yelling "mum, mum come quick, I have great news!" The mother asked "what is it, what's so exciting?!" to which he proclaimed "I had sex for the first time today!" The mother gasped, raised her hand and slapped the boy across the face. "Get up to your room and stay there until your father gets home!!" yelled the mother.
An hour later the boys father arrived home, got the update from the mother and went upstairs to talk to the boy. "So I hear you had sex for the first time today" said the father, "Your mother is upset, but I think this is something for a father and son to celebrate! What do you say we go and get you that motorbike you've been asking for?"
"Wow," answered the boy, "but do you think we can wait until tomorrow, my ass is still killing me!!"