If I were a heterosexual woman with my sex drive I have now as a man I'd be somewhere around 300
As someone who has been around the block, naked, I can say that I wouldn't be horribly put off by 50, but thats NOW.
Were I much younger I know I'd have been freaked out by it and most likely run far far away.
Just do what you are comfortable with, its not about logic, its about what you want in this case.