Nudism can be a family activity.
Swinging definitely is not.
There's definitely a different vibe when you're packing to take the kids to the beach compared to the one you get as a couple dressing to hit a swingers club.
PS When the Beach we were going to got too sexual we left the kids home and then finally stopped going there altogether.
The truth is Swinging is hard work, Nudism is relaxing.