Do your pets have any strange habits that are potentially dangerous?

Two of my three cats have quirky habits that always scare me half to death.

One really loves to eat plastic. Cellophane, bits of plastic bag, candy wrappers, condoms, if it’s made of some type of plastic or similar material… you can believe I’ve had to chase him around the house to get it out of his mouth at some point over the years.

The other cat loves to sleep up against my coffee pot when it’s been brewing. I always carry him away from it. I’m afraid to shoo him or squirt him with the water bottle for fear he will spill the coffee on himself. I’m terrified he’ll be burned. The same cat really likes to eat my hair (which happens to be very long). If he finds a loose strand he will eat it – or if I am relaxing or sleeping he will literally pull it right out of my head. I’ve had to start sleeping with our bedroom door shut for fear that my cat is going to choke on my hair.

Do your pets have any quirks that scare you?
Any tips to stop ANY of this behavior would be awesome, also.