one earlier reminded me of one that´s miles better:

A young girl has a party tonight, but has no transport, so she goes to her dad:

“Dad,lend me the car tonight”

“no” answers his father”

“Oh, c’mon dad, I’ll be a nice girl”

“h’mmm ok” the father says “but you gotta do something”

“What is it”

“suck my male reproductive organ”

“DAAAaaddd, I’m like… totally not doing that”

“As you wish, no car for you then”

“h’mmm… ok, dad, I’ll do it, but just this time”

So the guy takes out his male reproductive organ, the girl goes down on him and sucks it:

“Ewwwww… dad, it tastes like ****”

“****??” says her dad, “****, you brother asked me the car earlier”