That happened to me Put on my suit (old but looked fine), went to lift weights for 15min (with clothes on!), then was ready to get in the pool. Oh, I have to go to the bathroom. As soon as I pull the suit down I see it's completely worn in the butt! Maybe it was the weights. Couldn't bail on the swim so I walked around with my arms nonchalantly behind my back and hoped you couldn't see it when I was in the water!