In my youth, during the time I was discovering my sexuality, I took an average, or maybe slightly larger than average, sized cock. It was a bit of a struggle to get it in and took quite a while but with a bit of lube it felt so good and naughty to have it in all the way. Nowadays I enjoy my wife fingering me and agree that anal pleasure one of the best feelings anyone can have. Given the right circumstances I might like to be filled by a good sized cock again.