There's an Evil Cat Outside...

...that's trying to hurt my cat! >:U I dunno wtf is wrong with it but every time my cat goes out I always hear him screaming and there's the son of a bitch trying to attack him. But ofc soon after he asks to be let out again and whines about it until you do let him out. (My kitty is a big whiny sucky baby that wants attention, outside, or treats all the time. .-.) 

Not even an hour ago I heard him scream and ran out in pretty much nothing, no shoes, and rescued him from the evil kitty not caring who saw me haha XD 

I was under the impression the cat attacking mine was a female and that they were close like lovers or something, but lately they don't seem to be getting along it's weird. 

Does anyone know why he might be getting attacked? Cats are weird... they tend to act like they're dying when they mate or get together from what I've seen. (If the cat attacking mine is female...)