Recently I have gotten into wearing thongs under running tights (I'm a guy). It's a men's cut so there's plenty of room for your junk. They provide good support for the package and avoid the "panty line" in the back. In my experience, it's a vastly superior experience to briefs, boxer briefs, or heaven forbid, 3" split shorts underneath which all show lines on your ass due to the skin tight nature of the running tights. Does anyone else do this? Why is this not more popular? Seems the ladies figured this out long ago...