People here have some...odd notions...about red hair. Practically every European population has the genetic capacity for red hair. Heck, so do quite a few African and Asian populations. However, there's a specific set of recessive genes that, for some unknown reason, is present in 50% of the Irish/Scottish genome (where it gets expressed in 20% or more of those thus explaining why Irish and Scots are the most red haired people on the planet!). Living in relative isolation was probably an essential part of that, and it's easy to forget that Scotland was named after the Scots (who originally were Irish Gaels who spread their culture to West Scotland in between raiding the British coast, of course). You're welcome, by the way, Scotland :).
In any case, I have dark brown hair and everything below my ear tops grows out a darkish red shade except my chest hairs for some reason (the armpits are red...). Even the parts not seen in public, ahem, are covered in reddish hair. My eyebrows are red! In many ways, my problem is the opposite - my hair shouldn't be brown on top :P.
I also have the usual symptoms that often go with red hair: I have pale skin, my skin is well freckled but pale, and when exposed to a Summer sun I turn beetroot red and burn. Then my freckles get a bit bigger and I completely fail to tan. I could sit in the sun all day and just get red skin for my trouble - though the accompanying blisters ensure I keep the sunscreen generously applied!.
I can't complain though, when you have enough freckle coverage, you really don't need a tan ;). It's a bit pointless really. My skin probably has more melanin in its freckles than most people scrabbling for rays ever get in a light tan.
If you do decide to grow a nice red beard, there's nothing to feel embarrassed about. If you have any Irish/Scottish ancestry, then it's actually not that strange so embrace it. Red hair isn't exclusively an Irish/Scottish thing anyway. If you find other...parts...are covered in red hair and it's just the top 5% of your body being awkward, then it's time to admit the truth. You're really a ginger. You're just disguising it by covering up :).