just to add my two pennies worth
if by definition 'average' is 5-5.5 inches then it is not 'small' just average? if someone were 4 inches then that could be classed as small just as if someone were 7 inches it would be large - but these are just descriptor words and don't mean anything otherwise.
i'm dating a younger guy, his dick is spot on average and for me, given who it is attached to, what he looks like and acts like overall, it is just perfect.
If he was a complete dick in life generally, then i'd think his dick wasn't perfect for me.
so overall the size is more irrelevant for long term commitment partners in my view, and I can happily play with a 5-5.5 inch dick as an 8 incher.