my bf had a booty pic in his phone.

Okay so tonight I was hanging out with my boyfriend, he's my baby daddy also, we have a 1 year old daughter. But we were hanging out tonight and we were on each other's phones, he was playing a game on mine and I was just looking through his pictures. I came across his deleted pictures and there was a booty picture deleted. I asked him what it was and he played dumb at first and said it was a random picture he got off line then he admitted he had it on there to jack off too. We have sex almost everyday so I honestly don't understand why he has it on there. Finding that really made me feel like shit because it makes me feel like I'm not enough. I just wanna know what are some of your guys opinions, like what should I do or have any of you had this happen also?