Going Commando

The only time I wear underwear is if I'm either:

A-on my period

Or

B-trying to be sexy.

Aside from that, I have a big butt, so no matter what I buy, they ride up and give me wedgies or leave me uncomfortable. I always make sure I'm hygienic and never wear pants twice without washing them, so I don't see a problem with it.

Is it wrong?

What do you guys think?