Why do men like anal sex? eeww :'(?

The reason I asked is because my boyfriend wants me to try it with him and I don't even know why he dared to ask me because he knows how i feel about that and i told him my experience with that before.when i tried it before it it hurted like h3ll so i couldn't go through with it.Another thing is its unnatural god gave women vaginas for a man to poke not our a holez.so now he is mad and hr said that almost every woman is doing it so I fired back and said"Im not every woman".now he is giving me the silent treatment.Oh f###Ing well.