Turn off. So easy to contact bacteria from the outside world-especially on seats. A great way to get a methacillin resistant staph aureus infection. Seats are infested with bacteria. Underwear is a great bacteria barrier. Especially if you live in a damp environment, you will wick up those bacteria like no tomorrow. And someone's dirty hand between your legs without panties? Run and get a script for bacterial vaginosis treatment.
It's the opposite of erotic to me. Especially if you have to sit in a public place like a restaraunt or movie theatre. Do you know that lots of bus people put the filthy bus pans on booths while cleaning, or people may rest their feet on a chair (and shoes touch dog shit, vomit, etc) or how many stress incontinent people sat in your movie seat or restaraunt chair. I'd be getting the thickest cotton crotch panties they make.. Commando is just gross.