Gosh this is an extreme level of insecurity, I think you need help , in the form of therapy. I struggle to believe it’s not coupled with jealousy,
you know he’s seen a naked woman before right, he wasn’t a virgin when you met, he’s had sex with other women, women he fancied, he’s seen hot women throughout his life, be it in porn, on phone images , walking down the street or on the beach, he will have seen the bodies of hot women throughout his life, not just in shop windows in amsters.
which I’ve walked down the street in the red lights district in amsters, with my husband and some friends, I found it quite shocking. The poor women are standing in windows, yes some come out and proposition you, yes many are indeed hot, and yes they are pretty much all in sexy lingerie. Howver everyone’s definition of hot is different, some are very physically fit, some slim, some sort of average, some very over weight, some small, some tall, some big boobs, some little boobs, they cater to all tastes.
i don’t think anyone would find it erotic unless you’re some pervy bloke looking to pay for sex. At no point during that did it even occur to me to compare myself to the women, no more than it would occur to me to consider comparing myself to any other women my husband sees, which is the normal healthy reaction.
so try some therapy as this is hugely unhealthy,