[M4F] - Have you gone from an innocent relationship to something sultry/naughty in an instant?

I have had a number of situations in the past few years that have gone from very platonic or innocent, to intensely sexual very quickly.

I'd like to hear your stories, fantasies and desires along this theme. Of course, I am happy to share mine.

Example:

I met a very Christian southern woman on OK Cupid. She was nice, fairly attractive and interesting. I was sure that she wasn't interested in anything more than being friends or chat partners. Then it came out that she had a fantasy of being tied up and having her face f'd (she refused to use the f word because of her religious upbringing). Making her fantasy come true was better than I imagined.

One thing I have realized is that there are a lot of women who are looking for someone to lead them to their fantasies. Not always looking to be dominated or made submissive, but certainly looking for a man to lead the way and give them permission to cut loose.