Maybe they are confusing the book character with the actor...In the book Eric is very well endowed
Sorry to burst your bubble, but Anna P. said seeing "all of his glory" in her photo shoots with him fully naked and his walking around refusing to wear the "sock" while they film like her husband does that he is "Huge and not lacking for anything".
His current girlfriend has made a few off-handed comments about his size.
I do not think she is the smartest actress in hollywood but she does have all of him.
So no one here is confusing him with the book character!