why am I always "The Mom"?

Can't believe it. I went to get coffee this morning at a local shop, and what do I find myself doing? Wiping up all the milk and *!"# that everyone else has spilt and then just LEFT there. I am all the while thinking, "Did their mother's never teach them to clean up after themselves?"...themselves meaning all the other messy coffee shop patrons who are not obsessively cleaning the counters....