Fleas bite, and their saliva is very allergenic to susceptible animals. This causes skin redness, itching, biting, scratching, chewing, crusts in the skin, and even a greasy feel and strong odor for some pets. In non-allergic pets, fleas don't bother the animal in these classic ways. Fleas love humidity and warmth.
It is a way of getting their name in the tabloids to promote their latest movie. Andrew Garfield likely got a text message, from his agency, informing him that he was dumping his girlfriend and on which date the media would break.
Nermal is a cute grey tabby whom Garfield is jealous of. He revels in his cuteness and proudly proclaims himself as the cutest kitten in the world. Nermal can be quite devious at times like when he tricked Garfield into thinking there was a shark in his water bowl by swimming in it with a shark fin.