let me throw a few more advantages out there. i'm a 4.8 incher so i speak from experience:
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4. if laying on a nude beach, can get an erection with no one noticing
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I approve of your size & sentiments, but item #4 seems improbable unless there's some other detail you've omitted. Does your erection point in an inconspicuous direction? Or do you have really, really deep pubes?
Looking back from what I can remember, I've been hit in crotch approx. 5 times in my life...and a couple of those times I pretended that it hurt and doubled over and put on a good show. I'd have to say my size, the fact that I'm not sticking out down there, saved me on those days...advantage
Strike my last comment, I guess technically that has to do with size of your balls; and not really the size of your cock.
Your first comment got it right. I don't have huge balls, but my dick filled out my first cup so that it 'floated' on my genitals in a bad way. One time a player just lightly bumped it with a bat, just accidentally when he picked it up, and a crippling pain knocked me down so hard it felt like the ground had been hammered into my face.
I didn't have the nerve to tell my folks, so I spent the next few weeks walking home from school (about 5 miles, seriously) and spending my bus money buying drugstore youth cup-supporters from Walgreens and Pay-Less Drugs. Finally I got an adult cup at Big 5 Sporting Goods, and it worked.