Sorry to hear that. I also lost a friend to addiction who's experiences with older men in her formative years were unfortunately quite negative, which sent her down the addiction spiral and made her seek out more experiences with older men. Those experiences and the addiction both, I believe, ultimately stemmed from her father's actions. His own addiction and abusive, neglectful behaviour being a result of trauma in his early life. I can't speak to your friend's past of course but I imagine men and substances filled a hole in her own life likely left by a similar generational trauma and abuse cycle.