this guy got shipwrecked on an island, and the island only had men on it. so he goes up to the leader of the island, after 2 weeks and no sex, and says "hey, what do you do for fun around here?".

the leader of the island says "you see that barrel, stick your dick in it, and pump". so this shipwrecked guy walks up to the barrel, pulls out his meat, and starts pumping. after blowing his lot he comes back and says to the leader "when can i do that?", to which the leader replies "monday through friday, and saturday !".

the new guy says to the leader "what about sunday ?".

the leader replies "thats your day in the barrel !".