I married the Biggest liar

My husband is one if the biggest liars I've ever met. It saddens me because he's my husband & idk what I can do to make him stop being the way he is. He'll literally sit there and tell me a whole story that is nothing but lies. I just listen and act like I believe it because I'm embarrassed for him. I got his phone one morning and I found out he watches porn. Not just porn but he was looking for the Kim K sex video, (we had been watching keeping up with the kardashians) and he would always tell me how they are so fake looking and ugly but yet he was searching for Kim k. I don't know what to do. I'm so embarrassed for him that I act dumb like I don't know what's going on. And I dint confront him either. I've cried to him in the past telling him to please stop lien to me to be straight up but it seems like he's not changing... my heart aches bc I don't know why he's like this such a liar for literally ANYTHING! .....