Even if OP is trolling some, I can still see his point in all of this.
I don't think it's cheating, but it's difficult when two people are in a relationship living such different lifestlyes. If it's any condolence to you, I have two sets of gay couples who are my friends (4 people), and they act the same way when we go out. Especially one couple. They hunt together, and makeout with other people on their own.