Should your penis get hard?

it should party with girls

Pull it out and beat on it till it gets sick then clean up and put it away

It all depends on what point you are at in the erection, but usually it's very stiff and it's hard to bend or move the penis.

There is no designated size for one penis. Everyones is different.

By doing something to it. Rubbing, actually having sex or many other things. Masturbation etc.