Is it normal that old men turn me on so much?

I didn't think it was something I would ever want to do until I was made to suck an old man's big dirty smelly cock when I was 18. I thought it would be disgusting and I tried to resist the feeling that I had when I was sucking his big cock but I couldn't help how it made me feel. The total humiliation of being on my knees in some public toilet with his cock in my mouth turned me on so much I had to take my little thing out and play with it. Since then I've sucked about 560 old cocks.