Why dont my husband look at me while having sex?

ok we hae sex n he dont look at me its like he dont want to touch me. i go to kiss him and turns face away . he dont even want to kiss me at all i noticed sometimes he try to play arround and say something so he wont kiss me. why does he do this .. our breaths are ok and nothing wrong with my weight he likes me the way i am but i dont know what to say.