You got that right. You won't believe the damage little dicks do. I am being 100% serious here.
With a big dick, when it goes in and out your O-Ring looks like:
O <--in
O <--out
with a little dick... your o-ring looks like :
O <--in
. <--out
the constant poking and stabbing that little dicks do you will end up with more hemrrohoids than you can imagine. The sphincter can never totally relax because it's elastic nature is constantly expanding (on the in stroke) and contracting back (on the out stroke).
if you don't believe me, there are some porn sites that offer interviews with female porn stars... they say the same thing. That AnnaChong of whoever set the record in that gangbang video actually had the producers to determine who was and was not allowed in her back door based on shortness of length.