Q: Dear Mr. Nick!
What is this thingy between my legs good for?

A: That depends on whether you are female or male.

If you are female then you are in bad luck cause you only can use it to stick things into it, like umbrellas (this is the most common), exchange money, bottles of all kinds, fruits and vegetables, ... nearly everything.

If you are male you can use your thingy for a lot of various things. For example you can use it to greet other people, for that purpose just lay it in their hands, they'll be really happy about this.
You can use it to kill flies and other annoying insects, just like a fly-swatter.
But most times a man's thingy is used in cafés. There you open your trousers, take your thingy out and first show it to everyone there. Then you compare it with all the other men's thingys. After that you order a cofee, sugar it and finally use your thingy to stir the coffe. Do this every time you order a hot drink.

Also take a look at the differences between men and women