This bloke picks up woman at the local pub. They go for a romantic
walk down the street. They walk hand in hand and as they stroll his
lustful desires rise to a fever pitch.
He is just about to put the  hard word on her when she says, "I hope you don't
mind but I'm busting to have a piss".
Slightly taken aback by this vulgarity he replies, "OK why
don't you go behind these bushes".
She nods in agreement and disappears behind the bushes.
As he waits he can hear the sound of nylon knickers rolling
down her voluptuous legs and imagines what is being exposed.
Unable to contain himself for another moment, he reaches through
a gap in the foliage, his hand touching her leg. He quickly brings his
hand further up her thigh until suddenly he finds himself gripping a long,
thick appendage hanging between her legs.
He shouts in horror "My God, don't tell me your really a bloke!".
"No" she replies", "I've changed my mind, I'm having a shit instead."