A young courting couple are out for a romantic walk along a country lane.
They walk hand in hand and as they stroll his lustful desire rises to a
peak. He is just about to get frisky when she says, "I hope you don't mind
but I really do need to have a piss".
Slightly taken aback by this vulgarity he replies, "OK why don't you go
behind this hedge". She nods in agreement and disappears behind the hedge.
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 his
animal thoughts a moment longer he reaches through a gap in the foliage,
his
hand touching her leg. He quickly brings his hand further up her thigh
until
suddenly and with great astonishment finds himself gripping a long, thick
appendage hanging between her legs. He shouts in horror "My God Mary have
you changed your sex!".
"No" she replies", "I've changed my mind, I'm having a shit instead".