My husband’s love-making irritates me

My problem is my husband. Before we got married, he was very descent and a gentleman. Since we got married, however, he has turned into what can best be described as an animal.

He likes to have sexual intercourse in unusual and perverted ways. Although we have a comfortable bed, he likes to lay me on a hard floor. He asked me to suck him. I want to please him in this, but the thing is so large, it always makes me choky. I never asked him to do anything abnormal so why has he turned into someone I now fear? 

It has got to a point where I hate making love to him. I have even thought of running away.