Depends who it is, if they ain't into vore, then probably as long as they allow me to! If they're teasing me a ton and want to be food, we'll see how long I'm on their feet for, but I can imagine quite a while! If it's one that's a pred, well... I'll try and make sure they're in a state of bliss before I consume them entirely >:9 depends who it is and how much I'm enjoying sucking their feet for~