THIS IS YOUR BRAIN ON CRACKY

I’ve commented here before and I can see why this comes off as trolling but it’s a genuine question. My bf goes to the wash room often for a little too long and the toilet never flushes which I assumed was just him wanting his jerk off time. However, I went through his phone recently and discovered a lot of pictures of Cracky-chan I’m a sexual context (that being Cracky with large breast and as a women). He likes anime so I knew he has a thing for changirls as so do I but, this makes me quite questionable on his intentions with these photos. Should I confront him about this? Is it probably a lighthearted joke? He talks about Cracky-chan often as he does like the girl and I often gift him items of the girl thinking it’s just a cute and sweet thing. What should I do? Asking for actual advice. Thank you.