Well, here's to hoping you're never a 300 lb. escapee from an ALC. May you always be of perfect body, sound mind, flawless health, and full head of hair.
To clarify; you're attracted to what you're attracted to. No problem with that, but please don't insult what you don't like. There's plenty of people in all age groups here, and some of the posters here are exactly the people you describe. I don't think you'd like me to use disparaging terms to describe exactly the type you and your wife happen to be.
Still reading
Swinging is a spectrum. There's plenty of people across all types and desires here. "Tame" swinging (having sex in front of others, watching others doing the same) as you describe yourselves, is common and you're not going to be out of place because you don't want to have sex with other people.