I have read that some males will exhibit an egg spot, it is rare but it happens. Are you sure it is a full beard? Some females may have a bit of one but it isn't quite as larger as a male's beard and it may not stick out from the gills when they are closed like a male. Perhaps you have one of those males that have the egg spot HRMMMM
some males just won't flare, perhaps he isn't stimulated enough to flare or maybe he is just really chill
http://aquaticpassion.animal-world.c...?showtopic=592 website is kind of helpful