Going back to the OP's original question, having a micro-penis might be just one of any number of self-perceived inadequacies that can drive a person to kinks, like our favorite ones on Zity, and away from a confident quest for sex.
Some people just throw in the towel, figuring they're too old, too fat, too ugly or in some other way too far in the left side of the market bell curve, and fuck it, they'll find something else to get them off. Or they just check out altogether. Inadequate cock size is one potential driver, but certainly not the only one.
But, plenty of people here are happily married (or happily divorced) and in relationships and still love a good 2-quart journey of bliss for its existential kink. Lots of women too. For me, I've been sticking stuff up my butt since age 6, and cock size definitely wasn't on my mind then when I found Mom's bulb underneath the bathroom cabinet.