I’ve worn these once. They are in great condition but have been collecting dust in my closet. There is a mark in the built in underwear, but I can confirm I’ve never crapped my pants in these and I’m not sure what it is, especially since they’ve been in my closet for years. I’m the single owner of these. These are awesome for long distance runs! Although these are labeled as a medium, they fit small. I’m a size 6, 5’6 and 130 lbs and they fit TIGHT on me.