I think there was a lonely island song or something, but this maneuver has been around for hundreds of years and is an integral part of many cultures.
This maneuver can be performed in unfamiliar situations to make new friends.
Works for all penis sizes and if performed correctly makes the penis appear an inch or two larger than usually is.
It is a quick and easy way to impress a lady, or ladies. Law enforcement officers and land-lords are impervious to the act and it is not advised to use it in situations involving either or both.