I have 3 slips, a mini skirt style one, a midi dress style and a long maxi one. I would never ever wear a dress or skirt without a slip underneath, unless it's really well lined. It smoothes out lumps and bumps, makes the dress less see through if light in colour, and stops it from getting stuck up my bottom if I stand up. I see so many dresses from behind that would look so much better with a slip underneath. Have slips been confided to history? Is it like wearing a corset, codpiece or hoop under my dress?