Is it ok for a 45 yo woman to date a 20yo man? We all know the answer. Besides this issue I just cant see it being any more than a physical thing as being another generation ahead you have too little in common. You are an entire generation ahead of this girl.
P.s Ive had a couple if bfs 10 yrs+ younger myself and it all fizzles out becomes tiresome. I reakised I wasnt with equal minds.