My size is XXXM.
Never worried I was too small, but was deathly afraid of popping a boner when nude. But one of the friends I made at the gym once gave a very nice compliment in the locker room about my penis. Quite a revelation to find my man bits are pleasant to the eye (regardless the shape of the rest of me, or my extremely average size dick). I figured if anyone else enjoyed viewing me, they probably wouldn't mind seeing me erect too. Since then I don't worry if I get a little inflated in the locker room showers. I still don't "display" if I get a little hard, but the fear is gone.
Though there are some eye popping dicks that swivel everyone's heads, most are not so noteworthy. I've never thought less of a man due to his "not as endowed" physique. Likewise, I suppose no one looks down on me for any supposed shortcomings. Does anyone beyond puberty think derisively of another man due to his naturally smaller size?