Two dwarfs go into a bar, where they pick up two ladies of the evening and take them to their motel rooms.
The first dwarf, however, is unable to get it up. Making his depression is made worse by the fact that, from the next room, he hears his little friend shouting out cries of, "Here I come again. ONE, TWO, THREE..UuuUH!" --- All night long!
In the morning, the second dwarf asks the first, "How did it go?"
The first mutters, "It was so embarrassing. I just couldn't get it up no matter how I tried."
The second dwarf shook his head. "HA! You think that's embarrassing?
I couldn't even get up onto the bed."