For me, size doesn't matter, certainly not in the bedroom. Sex, for me, is about connection with a partner and their entire selves, not just one or two details. However, I can understand young men feeling a little self-conscious, say, in the locker room, because they think all their mates are bigger. Some fellas are growers, though. They don't look that big soft. And some dicks that look big soft don't get much bigger hard.
Plus, if your dick is too big, it's a nightmare buying underwear that feels comfortable to walk around in. Too big can make guys self-conscious too. I am over six inches - I don't think you're missing out on anything special. My "large member" becomes less noticeable with age too!! Somehow, I don't think anyone is admiring me in the locker room.
Most guys believe average size is 6 inches. Research suggests average penis size, however is only 5-5.5 inches, and probably closer to 5 inches. In other words, onelife, if you're a little less than 6 inches and above 5.5 inches, you're actually above average, statistically speaking!! You have nothing to worry about. If you were 5 inches exactly, you'd still be average. And if you were smaller than 5, you could still get the job done. Penises are funny, funny things.