Is it normal that i am extremeley aroused by older women?

I get very aroused at the thought of an older woman taking me into her house and treating me like a sex slave. I am 15, still a virgin, and am generally pretty normal in regards to my sexuality apart from this one 'fetish'. Anything to do with women between the age of 35-55 gives me an instant boner. But yes, as previously stated, i want to be dominated by a woman. IIN?