Is it a Culture Thing?

I recently watched repelled, as a woman clipped the fingernails of her three children on the bus.  I was so thoroughly disgusted I could hardly contain myself.  Contain I did.  I knew she wasn't hurting anyone, 'cept for the poor bastard  that had to clean all of the repulsive child nail clippings from off the floor.  Or the next person that sits in those seats and is forced to pull nail shards out of their pants after their bus ride.  Seriously, this is not the place for grooming.  We are no longer in tree tops, cleaning each other based on hierarchy and gender.  We should not be bonding with one another through the grooming rituals of our fury ancestors by pulling off protein pieces that protrude from the tips of our fingers.  Why this woman felt the need to preen her spawn in public on the busy bus on a Friday afternoon is so beyond me.  Could you not find the time at home?  Is this how you keep your little monsters from running a muck? You must literally hold their grubby mitts while you snap off pieces of keratin coated dirt chunks?  The fingernails were all over the floor, the seats and the children.  The entire family seemed completely at ease with this act.  It was as though they were bonding over nauseating the rest of the passengers...if they had the awareness to notice.  They didn't even realize anyone else was paying attention.  They were in their own little tree top, high above in their canopy with a floor created by crunchy nail collections and filth.  Why was this a thing I needed to witness?  Albeit they weren't causing direct harm to anyone but why on the fucking bus?  I clip my nails over the garbage in my bathroom.  Have you ever gotten a nail sliver?  It's not fun.  That shit is there to protect your juicy underparts and than to be discarded promptly when they piss you off while masturbating...er...or at work.  Yes, while working.  I guess I should be grateful the Alpha didn't bust out his feet for a little groom o' doom before my stop came.  Savages.