Here's the thing; everybody else here and in other forums on the topic seem to say or imply that their nipple hair is fine and soft (even if it is black); if that is the case with you, then it's possible he didn't notice and probable he didn't mind. (There also seem to to be plenty of guys who find this attractive and sexy.) Has he come back for more?
In my case, my girlfriend's nipple hair is short, sharp and (I'm) shocked. It is like a man's facial stubble, seriously. There was no way, once my mouth was all over them, NOT to notice. Since writing the above, we have now proceeded further, whereupon I have discovered that she keeps her pubic pubes (as opposed to her nipple pubes ;-b) quite well trimmed - nearly clean-shaven, even, and even has a labial piercing! So, it seems a bit odd, to me, that she would go to all that trouble to manage her mons and even adorn it, while leaving the unsightly, and more to the point uncomfortable, nipple-pubes all long and prickly.
I think, when the time is right and her pubes are a bit stubbly one day, I will offer to shave her down there, which I think would be a turn on for both of us and which I think she'd go for, at which time I will also very casually, if not sexily, offer to shave the nips, too, explaining how silky soft that'd be on my tongue, which she loves! (believe it or not, that alone, nipple play, can bring her to orgasm!)
What do any of you think of THAT approach?