mates

A bloke stops to visit his mate who has a broken leg. His friend says, "My
feet are cold mate . Can you go and get me my slippers from upstairs please
mate." The guy goes upstairs, and there are his mate's gorgeous twin 18
year old daughters. "Hi, girls. Your dad sent me up here to shag you." The
first daughter says, "That's not true." He says, "I'll prove it." He yells
down the stairs, "Both of them?" His mate yells back, "Of course, both of
them."