I had one experience dating a man with a micropenis, many many many years ago.
[TMI alert, I haven't posted in the Sex section of MN forums and don't want to overstep the decency mark whatever that is!]
He had a genuine micropenis, 2.5" long at most, and shaped like a carrot, wide at the base but thin at the end...the thing was, I genuinely don't think he knew it was on the small side, at all.
We couldn't have sex without a constant soundtrack of him saying "tell me how much you want my cock", and "tell me how big my dick feels" 
I was 18, and had only had sex with one other man before, but genuinely couldn't feel anything, it actually made me feel insecure and baggy because it just did nothing at all.
I could possibly have dealt with it if he had talents in other areas, but he didn't. I tried to give it a chance, and asked him to tell me what he wants...he said he wanted me to deep throat him 

Just...how? From lips to tonsils is about 4 inches as it is, it just wasn't happening.
Obviously I never said anything when it ended and have never told anyone in RL either, but he did go on to marry and have 5 children, so it obviously does do the trick for someone!