Because most humans treat their pets like crap and aren't worthy of any special consideration.

Working retail at Express during the holidays. Worst job ever.

I worked as a "greeter" (aka hostess) at a restaurant my senior year of high school. All of the greeters were high school girls. I'm pretty sure we were hired because management thought we were cute. They hit on us all the time. Very awkward and creepy. And to top it off, the businessmen who came in during lunch liked to hit on us, too. I once took an order out to a table (helping out the servers), and when I asked them if I could get them anything else, one grown-a$$ man in his suit and tie said, "How 'bout a hot tub and a rub down?" WTH! He said that to this 17 year old girl right in front of his coworkers! I recall the stunned look on their faces.

LOL that's nasty. I hope he paid for that somehow.

Yep. This is nothing new. Same thing happened when I worked as a counter girl at a restaurant....the main reason why I quit. The customers who came in to sit at the counter were all total perverted pigs. Do I need to mention the guy who would go to the bathroom every 5 minutes? Oh, and guess what he was caught doing? Disgusting!