It would still be fine for him to have it, I am the furthest thing from a pube hater whether it be adult or shota/loli I've just drawn him without it for so long that I feel like it would be weird if I did. He's awesome with them as well.
But I've just made up the reasoning at this point that it's because its funny he wants to be macho manly but lacks any. Especially the entire time he was desperate to grow a moustache.