After kissing each other goodnight at the front door, the guy starts feeling a little horny.  With an air of confidence, he leans with his hand against the wall and, smiling, he says to her:

“Honey, would you give me a blow job?”

Horrified, she replies, “Are you crazy? My parents will see us!”

“Oh come on!  Who’s gonna see us at this hour?”

“But can you imagine if we get caught?!?”

“Oh come on!  There’s nobody around, they’re all sleeping!”

“No way.  It’s just too risky!”

“Oh please, please, I love you so much?!?”

“No, no, and no.  I love you too, but I just can’t!”

“Oh yes you can.  Please?”

“No, no. I just can’t!”

“I’m begging you…”

Suddenly, the hallway light turns on …

and the girl’s sister shows up in her pyjamas, hair dishevelled, and in a sleepy voice she says:

“Dad says that you should go ahead and give him a blow job, or mom can do it.  Or if need be, dad says he can come down himself and do it…

… but for God’s sake tell him to take his hand off the intercom!”