I used to do this all the time back before I gave up wearing underwear completely. I would often start my day wearing underwear and I would go to the bathroom and take them off and put them in my locker for the rest of the day. Some times I would destroy them and throw them away which gave me no choice but to go the rest of the day without them. Or I would leave them laying on the ground somewhere and not come back for them. I think it was partly the excitement of doing things like that and the freedom of not having underwear on that turned me to going without them full time.
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