Shemale porn, but straight

Hello, recently started nofap, reason being that I am depressed and a few months back I discovered Shemale porn, even if I am straight.

The big problem is that when I watched porn, I got quickly aroused to shemales but not females, almost at all... ls it normal? Will it stop after a while of nofap? It causes me great depression and sadness. Let's start a thread about this and help others having the same problem... Be so kind to answer my questions and add all that you know.