Generally this toy is called a "strapless dildo". It is ment to be used by woman and inserted in their vagina. My girlfriend bought one to peg me but it is not easy to hold in place without a harness or special panties. Now I use it more myself with the short end in my ass through a hole in my diaper to gently fuck my girlfriend now and then. I think it wors only if yoy have a small penis and balls because otherwise they get in the way of the curve of that dildo. She finds it looks very funy and likes to laugh wit it...