Here's some advice. Next time you want to rub one out, don't do it near a window unless you've closed the curtains beforehand. And in answer to your question, yes, you are gay now. The only way a person can become gay is for someone of the same gender to see their genitals, so if your neighbor was the first man to see your dick, you are now gay. There is a cure, but it only works if your neighbor watches you jerking off while he walks backwards, in the same clothes he was wearing the first time he saw you, and at the same time of day, doing the same activity, after eating the same meal he'd previously eaten before said activity, and you have been very polite in your request for his participation. Be warned, though. If he refuses you, you will be gay forever. You have one week from the original incident to get things back to normal. Any later, and there will be no way back.