I was working out at a local gym not too long ago, and I noticed a thirtyish young man who couldn't have been older than myself doing a certain exercise that women normally do, meaning men don't usually think to do this particular exercise. I don't want to get too specific with this because you never know when this person might come across this conversation online.
Anyway, I noticed that his form was pretty out of whack. There was no one else in the gym at the time, and I didn't want to see him hurt himself while I was there. I went over to him and asked him if he wanted a tip or two on how to get the best out of this particular exercise. He said sure. I showed him the proper form for the exercise and then explained it as I was demonstrating it. I didn't think anything of it at the time, I was just offering a fitness tip to a fellow gym member.
As this gentleman was leaving, he said "thanks, I'm usually in here about the same time everyday." Then he smiled at me with this weird seductive smile. Now, I don't have a judgmental bone in my body, but that doesn't mean that I don't know when a smile is more than a smile. From the way he said it and the way he smiled at me, it was blatantly obvious that he was coming onto me.
It left me with an uncomfortable feeling, and as he walked out the door, it hit me what had just transpired. I was embarrassed that this young man's.. situation... hadn't been obvious to me before then. It wouldn't have kept me from giving him a tip on form, but it would have at least prepared me for what he said and how he said it as he was leaving the gym.