What does it mean when a man who is in love with their partner watches ?

Does it mean their significant other is less attractive? I am dealing with this right now and I'm not the prettiest girl and it really took a huge blow on my self esteem. He even lied about it, which meant betrayal. I thought he loved me enough to respect the fact that I give him my body. Does it mean there is something wrong with us women? :( I have a hard time dealing with the concept of him wanting other beautiful women on the videos. I thought I was enough since he has committed to me for 4 yrs