Twin's Surprise

Twin's Surprise by cactusman

Barbie notices your pre-cum and asks:

"And why is your penis leaking like that?"

"That's called pre-cum, it's a lubricant, I guess, although it contains a few sperm in it also..."

"OK," she says, "but why did you just start leaking more of that... pre-cum?"

"Because... I'm very... very excited," you admit, ashamed...