I had an idea the other day about giving yourself a body scrub outside to keep your tub from getting oily and hard-to-clean. Then it occurred to me that this would be the perfect way for couples with a private yard to enjoy some quality time.
First, make your own sugar scrub -- it's tastier than salt. Grab a blanket, lay it down outside, and cover it with a sheet. Have some towels, washclothes, and a big bucket of warm water.
First one gets scrubbed, then the other. Wipe off the excess with wet washclothes. When you're both done, roll up the sheet and shake it out in the grass. And if you're still a bit sticky, go take a shower. Now you're both clean and silky smooth. Whatever comes next is up to you.