Skills That Martial Arts Can Teach You That Don't Involve Hurting Anyone

You'll learn new terminology (unless the Martial Art is native to the same country you are, I suppose).

You could probably pass some moves or forms off as dancing, if you've got the guts.

Breakfalling can save your life. Take it from me.

Many martial arts start and/or end class with a meditation session.

You submit to the authority of those more experienced in the art; age, gender etc. do not matter.

Those belts don't tie themselves

How the musculoskeletal system functions especially.

Whether it's a ceremony or a pattern of movements, you can increase your ability to store things in your head.

Not panicking when you get hit or at the notion of someone trying to hurt you is valuable.

The purpose of the meditation is to leave the outside world on the outside and devote the lesson time to learning the art.