I've worn a butt plug for about 3 hours and it was hell (I just did it to see if I could go about normal activities in public with it in...and thankfully I succeeded). I doubt I would do it again...simply because the sexual thrill in my opinion did not nearly exceed the physical discomfort I experienced. So if that's even remotely close to what it feels like to have a dildo in a vagina for extended periods I'd say re-evaluate that idea.