35 years official nudists although we enjoyed sex in viewable places starting a couple years into marriage. We did a lot of finger genital play before wedded without penetration. Her mom was in the house but not in same room watching when we were making out! There was more too, you might say we've always been exhibitionists!
When we first joined ASA, now AANR, and started going to various clubs/resorts and on nude cruises I tended to get tumescent depending on what we were doing but never during group sports. But some with dancing or posing for photos with or without my wife, but interestingly not with other women.
We fucked a few times around the clubs outdoors when no one was present at least when we started. We left the curtains open to the bedroom for our daytime sex. We did use a swimming pool once, definitely need lots of silicon lube applied before getting "in". It's a chore in a deeper pool! Sitting on my erection in the hot tub is more fun and not noticeable when the water circulator is on?
We joined a Swing/"Masterbation" club about 20 years ago that met in nice double hotel room 2-3 times a month. We were definitely in the exhibitionist crowd. Whole different ambiance there when the clothing came off than at a nudist venue! Everyone at a lifestyle meeting is there to have sex or watch sex, most eventually join the have sex group in some capacity but not all.
Thanks for the Forum question, seldom think, Just Do It
