Funny, non-dirty joke I heard a while back: three union guys are on a construction site, a white guy, a black guy, and a chinaman. The foreman comes in and says, "Hey yous guys, see that pile of dirt? It's gotta be moved." He points to the black guy and says, "You're in charge of shoveling." He points to the white guy and says, "You're in charge of sweeping." And to the Chinaman he says, "You're in charge of supplies. I'll be back in an hour; have it done by then."
So he leaves, and comes back in an hour to find the pile of dirt in the same place; the black guy and the white guy are there, but the Chinaman is nowhere to be seen.
"What's up with this!" he yells. "I told yous guys I wanted this here dirt moved!"
The white guy says, "Yeah, well, I needed a broom to sweep, and I can't find that danged Chinaman to issue me one!"
Likewise the black guy answers, "Yeah, how am I supposed to shovel without a shovel?
So the foreman mutters, "Where the hell is that bastard?" So he walks around to the other side of the pile, at which point the Chinaman jumps out and yells, "Supplies!"