A masturbating carpenter

A carpenter was working on a roof. He realised that he needed a hammer. Another carpenter was still on the ground working. The first carpenter signaled (because he was too far up to shout) with his hands to the other carpenter that he needed a hammer (made a swinging arm movement).

The carpenter on the ground saw this, and then he started masturbating..

And he masturbated and masturbated.. until he was done.

He then walked up on the roof with the hammer, and handed it to the other carpenter. The first carpenter (with a very surprised look), asked him; " Why did you masturbate after i signaled that i needed i hammer?"

The other carpenter responded; " Yes, i was just signaling back to you to say; yes, i am coming".