Why do people take an instant dislike to someone for no reason?

It saves time.

Oh, there's always a reason, though it's not always apparent to everyone else. Typically, it's something internal, a reason only they will understand.

Like an ugly woman who's fought her whole life to be successful, and then some young, beautiful, ignorant girl walks in the room and immediately gets doors opened for her that the ugly woman had to fight for years to do the same thing. Or a guy seeing someone wearing memorabilia of something he hates, like a nasty rock band, or a celebrity he had a "fallen idol" moment with. Or a woman who's infertile, and suddenly, all her friends at work are fawning over a female coworker who just got pregnant. Sometimes it's just their face or their voice that sets some people off.

Usually jealousy. They have some hidden insecurities about themselves. Also, racism is a big one. Most racism is subtle.

No, they always give me plenty of reason.

Sometimes it just comes down to the way you carry yourself, how you speak or facial expressions that can immediately rub someone the wrong way.

I'm not sure but I think it might have something to do with lobsters.

The cleaning world can be full of meanies.

Yes. Some girls are just bitches.