acting strange

ok so my boyfriend is like secretive it's funny to me . like I notice that when he is on his phone texting or going through his gallery he hides his phone. and when I'm on mine he all up in it. I dont care that he looks in or through my phone I got nothing to hide. so i confronted him about it and said so why are you like secretive I dont care what's on your phone but it got me aggravated that your watching like sports listings and as I walked in and saw that you like his your phone I know you have pic of you ex and videos etc.. you told me I dont care but the reaction all the time is annoying he just stood there quiet and said he dont know. omg like seriously