My issue with stuff like this is...

MANY PEOPLE ARE CREEPED OUT BY THIS PREDITORY BEHAVIOR

In situations where flirting, friends that also like to show off, close relationships, meat-market type bars, etc. I like to do this. I think it is a turn on, but those are in situations where sex or fooling around, etc. is the undertone/expected.

The movies are not that place. It is a family place, a non-sexual place, etc. I have witnessed my share of flaunting at inappropriate times, and I am not shy, if I am not in the mood and I am creeped/grossed out as a result, i'll say something.
Kids, teenage girls (and boys), and most everyone else in the course of their regular day do not want to see this, telling yourself otherwise is called self-delusion, so please stop living in denial. (as I said, unless im horny, i really dont want to see it either, and I am usually not horny when at places like the movies)

I am writing a lot because it pisses me off more than a bit. This is a more extreme scenario, but when I was 12 I had a creepy guy follow me into the movies, i moved seats - he moved seats also, later he followed me into the bathroom, peered at my while pulling out his penis (and not peeing) at the urinal and looked right at me and smiled. I ran This stuck with me. So now, if it is obvious what someone is doing, I will ruin the moment for them.
I have a few times told guys to: shut there legs (shorts showing stuff), to cover it up or take care of it (obvious boner in basketball shorts) to just "please stop, that is gross, and that really isn't something worthy of flaunting" (to a smaller guy fondling himself on a park bench - I dont have anything against smaller guys, and bigger wouldn't excuse it, but it just isn't anything to brag about either) etc.

The point I am taking so long to get to is this, in those situations it is not victimless. Getting turned on at the expense of others is called predatory, and there are reasons lewd behavior can land you in jail. I am an exhibitionist, but I am where appropriate, like on here.

In closing, next time you guys get the urge, keep it in appropriate places, and definately nowhere that children are present. Do not be a creepy perv, you make consenting adults like myself look bad.
Just imagine how you would feel if I (or someone else) came up to you and mocked you while you were trying to get off/arroused (this doesn't count if abuse/mocking gets you off) as it doesnt matter if you are big or small, i will always find a way to mock you, and you will be made to feel embarassed and uncomfortable, the "excitement" and the mood will be ruined for you. The fun will be taken away.

Don't like the idea of that? Make you a little angry at the thought of someone ruining that for you? Well, now you know just how you made many others feel.