Sex outdoors truly isn't much different than sex indoors, except that it's less comfortable and there may be some element of public discovery involved. There may also be biting bugs. The biggest exception I've found to that is sex on the beach. Sex on the beach is a horribly overrated experience and I would say is something to be actively avoided unless you've stepped cleanly onto an immaculately clean large blanket to start with. Sand gets absolutely everywhere, and I do mean everywhere. It's not good. I didn't learn the first time and did it a second time following an excess of wobbly pops and now I'm pretty sure that even drunk I wouldn't do it again. The only mistake I've ever made that was worse as far as locations go was having sex with my high school girlfriend on a pile of pink fiberglass pads because we thought they'd be soft. That was a mistake that haunted us for days afterwards. I can't imagine any rational, knowledgeable adult (we were neither) would ever do that, but if you ever think about it, don't. lol