Ask them if this is their way of trying to sell you their magical underwear. Offer them a beer, a joint, some crystal meth, a 7th wife, some coffee.
I know it's your back yard and you can do what you want, but I highly recommend wearing at least a cup or something. Just in case you hit a rock or some debris, it doesn't take a direct path to your junk. Also, I don't even want to imagine getting sunburnt on the frank and beans.
I’m pretty sure Mormons don’t drink beer. But they will have five wives, and only three of those are under the age of 17.
I worked, saved, went to work with pbj's to get me a zero turn radius riding lawn mower. I got the front shield and all, but the only thing on me you see naked is my chest. Unless I stand up on it, but I dont as it likes to suddenly stop if I stand up, and that sends me rolling over the front, and my current fear is it doing that and then going Maximum Overdrive over my ass. Nope. So I put on a hat, sunscreen and sunglasses, a cup of iced tea in the cup holder, and my ear buds in, and crank some music and spend the ten minutes naked, in the sun, on my lawnmower. No one, not even neighbors and friends who catch me doing this give two flips as it's "Oh, its just Writer being Writer." Shrug and join my wife for cold lemonade. Also the seat is squishier than an office chair and I tend to sink in a little, so if my john thompson isn't standing at full attention, then you really do not see anything more than my hairy thighs and shirtless back and chest. So why should I cover up, because your wife *might* have seen my good boy and his toys? I nude sunbathe with my wife in the backyard, but no one has complained, but I get on my lawnmower naked and every mormon loses their shit.
*Edit Note*
Those same people who I suspect complained to their leader about me, are living breathing hypocrites. They would literally hold conversations on their second floor balcony while me and my wife and friends nude sunbathe around my pool. They would come to pot luck parties and act like they are our friends. So why now, after the seventh time I rode the lawnmower naked, and before that pushed a push mower nude would they have a problem. There are no one under 18 in eyesight, they have no kids, and if they had guests, how could they see through a privacy fence AND hedges behind it from the first floor. I do not hate them, they are kind of nice people. But this shit has gotten too silly for my tastes. Hell, my wife invites them over to swim and they do come over and swim, EVEN AFTER my wife said that our pool is bathing suit optional. But I try not to be a dick, if someone with kids said something, I would stop, because I like harmony among neighbors. But if any more white shirt fools show up to put me in my place again, I might not be so nice. I try and respect others feelings, but in return I expect the same, or there is no way I can deal with you. But before I lay my anger on them, it might not be out of spite, I have an inkling of a thought that like LtBroccoli suggested, it might not be safe from their point of view for me to ride my mower naked. But even then, just tell me to my face, not some dipshit passive aggressive letter writing bullshit. and dont sic some mormon thugs on me. Just tell me to my face. I wont bite, fight or blow up. Too old to think with my fists. It just bothers me a whole lot. Sorry to rant.