"The new hooker''s first job" joke

The new hooker had just finished her first trick. When she came back down to the street, the seasoned veterans all gathered around to hear the details.
She said, "Well, he was a big, muscular and handsome marine."
"Well, what did he want to do?" they all asked.
She said, "I told him that a straight lay was $100, but he said he didn't have that much.
So I told him a blow job would be $75, but he didn't have that much either.
Finally I said, 'well, how much do you have?'
"The marine said he only had $25.
So I told him, "For $25 all I can give you is a hand job."
He agreed, and after getting the finances straight, he pulled it out.
I put one hand on it.
Then, I put the other hand above that one."
She paused, raised her eyebrows.
"Oh my God!" they all exclaimed, "it must have been huge!
Then what did you do?"
"I loaned him $75!