Oh Wifey, you have a beautiful mature body. I would make you cum like a seizure because I would take the time to pleasure in every small way.
C lastly, trans on its own is not a gender. i, for example, am a trans male. i am still male. trans women are still women, etc. trans just describes the experience of being that gender, not the gender itself. trans people are just as much their gender as cis people are.
Her butt hole looks hairy and stinky
Nice sexy boobs
Enough with the unnecessary breathing
It's impossible to weigh the pros and cons of most things, porn included. I could easily think of 10 different ways it could affect someone's sex life either negatively or positively. To answer your other two questions, you can have a compulsive behaviour that negatively affects your life, which is what most people would call an addiction. Search wikipedia for Psychological_addiction#Behavioral_addiction to get some more details.