My husband keeps lying to me

I have stayed off here for a little while because I needed to not think about my husband's problems so much that it consumes me. Tonight, however, I need to vent. He said he'd come home from work this afternoon and spend some time with me while we watch the game together. No game later, he is now asleep on the couch after an exhausting several hours of ignoring me while looking at public profiles of women on facebook. At one point, I walked in on him with his pants down, and he was quite startled that I found him that way. He said "I was just getting dressed" and "I was trying to find a person I knew on facebook (note that he had previously permanently deleted the 3 accounts I knew he had in my presence), but I never found her." That was along the same lines of what he said when I found his extensive porn history. I wonder how stupid he thinks I am.