I feel like I have to admit I've fantasized for a long time about being used as guy's (or two, or three...) cumdump. I love the idea of being called a slut (or any other name) and having a guy breed me deep because that's what pleases his cock--worshipping his cock is all that matters when I'm with him. I'd let him cum wherever he likes but I really love the idea of him shooting his load balls deep in me.
Nothing I've ever acted on, but it definitely gets me going.