Caught boyfriend watching to much . What should i do?

So....my boyfriend watches to much , or at least I think. I need mostly a 20-25 years old mens opinion, plus others too! Lately which I have been on that time of the month he has been watching it once to twice a day that I know of, which is ok to me, but today he went home for his hour lunch and I told him previously that I wanted him really bad while he was on lunch....I came home twenty minutes before he had to leave for work and he told me he didnt want to do anything when I pushed myself on him. Later he left and I got the idea that he already did his thing. soon after he went back to work I logged on his computer and looked at his downloads and recent opened files/history. I found (mostly women on women) and women/girls of age peeing.....even one pregnant women. My boyfriend is a sweetheart to me, but has a reputation of watching copious amounts of .....with his friends even. I am not sure what to do or if I should be shocked because he honest we all know that everyone watches at some time or another...just the fact that its women peeing and women Im little freaked out, but not sure if I should be! Any suggestions and how should i confront him about it? I dont want to loose his trust so i am thinking i might wait to see if it gets worse and if it does i want to definitally say something! Thanks for the help!