Gah I've seen something that was along these lines, but I'll be damned if I can find a page to link to. It was a threesome scene from Brazzers, 2 brunette pale teens - one gets on and try to ride but can't so her friend take over instead.
Never thought I was very big but my wife has always said she feels like I split her into if I'm not very careful or lubed up well. Lots of foreplay is required as well most times. I also hit her IUD so I try to be careful about that as well since I understand the cervex is very sensitive. We have some kind of misfit situation i guess. I won't fit in a toilet paper roll and am close to normal length so maybe she has a little vagina?