There's truth in that last bit.
A few months ago I saw this documentary about people with some of the largest penises in the world, and how it affected their lives. One of them was a guy who was a legend in 70's New York nightlife.
He used to wear really tight silver pants, with his dick against his left leg, almost reaching down to his knee and just paraded around with it for everyone to see. He had incredible status just for his size. He got invited to celebrity parties and has been a guest with almost everyone who was someone back in the day.
Anyway, they showed several of these guys, and they all had one thing in common: a troubled sex life. The disadvantage of a huge penis is that it will just hurt a woman as it hits the opening of the womb. Also, these guys can't go balls deep, and have to resort to just dipping their knobs a little, which is very unsatisfactory for them.
A vagina isn't even that deep, it can already be a problem with average to just above average sized penises. I've had complaints about going to deep (in certain positions), and I can assure you I'm no Lexington Steele.
One of the guys was married and his wife explained that the only way they could have satisfactory sex was by doing anal, very gently.
So there's your solution.