I loved the red and black lace dress and the panties that went with it, but i had an issue with the panties and wondered if anyone else had the same issue. If you put them on as sex clothing they stay on and don't come off during sex. I ran into this for a small amount of panties but most of the time they only stay on for certain poses but when switching to intercourse poses they are suppose to disappear. But these black lace ones don't disappear I was wondering if they are suppose to stay on always or if they are suppose to disappear?