If that were the only such joke, I would agree with you. But it wasn't. Do you think there would be mention of male strippers and dollar bills in a g rated movie in the sixties?
Point is, such double inferrence, artfully phrased, isn't wrong.
Well, then, people shouldn't be viciously attacked for noting that there is a double inferrence. You're not doing the attacking. But there have been many over the last few days who have.
Now I'm rested, and think for awhile I might be amused again.