As you mentioned your changing porn habits before, that could be one reason. Especially, if you`re masturbating to it and have orgasms too. Having recurring orgasms to one and the same imagery typically has a conditioning effect on the brain - which is well understood to be human`s biggest sexual organ.
Many men and women on these forums, including me, went through or are still going through a similar transition.
i used to watch a great variety of porn before, but somehow got stuck on natural looking Women who obviously enjoy themselves with one or more Black men. It even got to a point where porn that includes non-black male performers doesn`t appeal to me anymore, so i avoid watching it whenever possible.