My boyfriend bought me a pair of open cruth panties like these ones for my birthday, think they were more for him than me really, but I like wearing them for him under a skirt, feels so naughty.
I've got a few pair's of open crutch panties that I bought off Amazon, bought then for myself as they looked interesting and I wanted to try them. Now I'm a fan and I've even worn then to work under my skirt a few times, if only the guy's in the office knew.