Getting away from the plus size issue........Penis size: I (Mrs Scoobyroo) prefer an average sized one - I dislike well endowed men.

I am not going to comment on your other parts of the post as I am no stick insect either and can feel uncomfortable in certain positions, but that is more down to not wanting to see wobbly bits rather than not being satisfied

You say that you're not being satisfied from sex - but are your expectations too high in that respect? I don't come through penetration but other ways - it feels nice to come when he's (hub) inside me, but usually I am playing with myself at the time - it's nothing to do with hub or his size!