Do you think it's wrong that I secretly left my wife to go to a swinger's competetion?
What made you do that?
Because the main reason she's so pretty is artificial.
Your marriage is a legally recognized partnership and cheating will only complicate matters. If your relationship is in a spot where having an affair seems justifiable, stop, take stock of things and consider your options.
I am a swinger and there's nothing wrong with me. Swinging is fun and I get to have sex with hotter girls and guys.
There's nothing wrong with singing, but you shouldn't lie to your wife about it. Maybe you can be open with her about your desires so you can reach a mutual and consensual understanding? If she finds out you lied about it, it's likely to hurt her.