Of course, tights and leggings were being used in much the same way. In fact, I'm not sure what the difference is between leggings and yoga pants except maybe a piece of contrasting material at the waist.

I do agree ... it's terrible they're worn in public. I know I've spent hours watching the young ladies wearing them at the mall and kept thinking ... oh my ... that shows this and that one shows that and ... taking time to wipe the perspiration off ...