Little Johnny had to walk by a whorehouse on his way to school everyday.

Little Johnny had to walk by a whorehouse on his way to school everyday. A
prostitute always sat outside and called out "Hi, Little Johnny!" (while
wiggling your pinky). Johnny asked why she always wiggled her pinky at him.
"Well that's about the size of your privates, isn't it?!?" She laughed at him.
The next day, Johnny walked by and she did it again: (wiggle your pinky) "Hi
Little Johnny" and Johnny said: (put your fingers in your mouth to spread apart
your lips and stretch out your mouth) "How you doing, lady!"