Sexually attracted to old gay grandpa's

I'm 48 divorced straight guy who's been single for the last few years,
I have found myself feeling attracted and aroused with old men 60+ years old,
I have never had gay tendencies or been attracted to guys but I don't know why I have this sexual curiosity for old grandpa's,

I started to notice this a few months ago when I would see my elderly neighbor down the road,
I have always talked with him on a daily basis and we are good friends,
I have known him for over 10 years, I have been fantasizing of him these past couple months when I masturbate,
I fantasize that I'm at his house or at mine and im on my knees playing with his soft old cock trying to get him hard
As his cock starts to swell up and feel a little hard I start kissing and licking his cock up and down his shaft,
I then stroke his cock as I lick his delicious old balls,
Gently sucking each one,
And before I can fantasize more I am shooting my hot load,
Recently I started to watch old gay grandpa porn and I have been getting more than aroused and not only masturbating but I have also got myself an anal dildo which has been giving me some really great anal pleasure,
I don't know what to do or how to figure out why I have these sexual feelings for old men but my neighbor as well,
I have thought about going to the neighbors house and see what would be the best way to find a solution to this,

I would like to tell him about what I have been feeling in a sexual way towards older men and him especially,
But I don't know how he would react or what he would think of me and my sexual fantasy,
I wish I knew what I could do to help me figure out why I have these intimate thoughts and sexual feelings and arousal that I would like to find out how I can get it out of my mind or some way or somehow get the sexual satisfaction that I have been craving,
What should I do??