Extremely vanilla husband loves hentai...

Hello,

My husband and I share a computer. I got on while he was at work to do some studying and to take a break I got onto reddit, well and it was logged into his account so rather than go through all the effort to get into mine I was “ok I’ll just scroll memes on here for a while” so I did just scroll through memes and then he follows a ton of gaming pages and gaming advice stuff because he loves computer games...and then I noticed in his favorited pages he follows hentai....so I clicked on it and it’s like Japanese cartoon characters with giant boobs having sex?!?! This was super weird for me... my husband is a super normal, average go-with-the-flow guy, and he has never mentioned liking hentai to me before... he likes anime and I think some of it’s pretty good so we will watch anime sometimes....and we are open about porn, even watch it together sometimes so for him to never mention that he’s into this is weird to me? We always talk very openly together and communicate really well, though he does get embarrassed easily...so I do not know whether I should just not mentioned it and pretend I didn’t see it (I’m not angry or anything- just think it’s kinda bizarre.) or if I should bring it up but I don’t want him to get embarrassed or feel like I’m snooping or feel like he can’t look at it anymore...so maybe I best not say anything? I’m just having a very hard time because we talk about EVERYTHING all the time so for him to have not mentioned this in the 7years we’ve been together is weird to me.