Husbands taste in porn

My husband told me basically from the beginning of our relationship that he's always been attracted to cougars (for him the age range is 40s-50s). Until the other day it never really bothered me, and I've even made jokes about him "liking grandma's".

However the other day he gave me his old phone to replace my phone because I'd shattered the screen and a new phone just isn't in our budget. So I started going threw the phone because I knew he had porn on there and I wanted to delete it (our son watches movies on my phone during car rides and I didn't want him to get curious, go through pictures and see things he shouldn't). Him having porn isn't the issue, we've watched porn together and on nights when he's feeling frisky and I'm not I'm completely OK with him getting his jollys off to it.

The issue is that it was older women, and I know that this is completely irrational but now I'm not feeling that great about myself. Now I'm starting to wonder if this was/is his fetish, one that he actually wanted to pursue but now can't...... And like i said i know its irrational because I know my husband loves me and is attracted to me (the video we made was also on his phone and I'm trying to focus on that) but I can't shake this feeling.

During the course of our entire relationship I've gain right at 100lbs ( I had nexplanon for 3 years and it fucked with my thyroid) and I haven't felt great about my body in a long time. Now finding these videos of women who look nothing like me has made it worse.

I haven't said anything to him about how it's made me feel and I don't plan to because I don't feel like he did anything wrong, and I don't want him to feel like guilty. I guess I just really needed an outlet that wasn't our friends (who would say something to him about it).