I once got picked up at work by a young guy who flashed the biggest tool I'd seen - yes I was tempted, but yes I thought I'd top him. It was a donkey dick, two hands but no matter how hard I sucked rubbed and treased I couldn't ever get it above a semi, over a few visits I tried but failed and I never even topped him more got him to have an orgasm. One of my best fucks was with a radio officer on a cruise liner. Skinny runt but massive smile and personality and sexy as hell. But in the cock department he was below average, a pencil dick but oh how he knew how to use it - every time he hit the spot, fucked like a jackrabbit and had amazing stamina and the ability to rest for five minutes and be ready to again. He was such an amazing fucker that I never even tried to shag him, being shagged was so good every time.
Taking it up the arse is an art, it's no good approaching it with a sledgehammer which is how the big dick brigade seems to think it's done.