"Talking her into a sexual act..." joke

A boy takes his girlfriend back to her home at night, and when they reach the front door he leans with one hand on the wall and says to her, "Sweetie, why don't you give me a blowjob?"

"What? You're crazy???!!!"

"Don't worry, it will be quick, no problem."

"No!! Someone may see...a relative, a neighbor..."

"At this time of the night no one will notice."

"I've already said NO!"

"Honey, it's no big thing... I know you'd like it too."

"NO!!! I've said NO!!!"

"My love... don't be like that..."

At this moment the older sister shows up at the door in a nightgown with her hair totally in disorder, rubbing her eyes, and says, "Dad says either you have to blow him, I have to blow him, or he will come down and give the guy a blowjob himself, but for God's sake tell your boyfriend to take his hand off the damn intercom!"