Since it is sex, undressing is the most relaxing choice. As long as the local safety factor is ok, don't be afraid. This way is to enjoy the relaxation and small stimulation of sex in an open space. Of course, in addition to safety and concealment, we should also consider whether it is convenient to escape. It's best to run from one place to another in the suburbs, and don't cross the road.
But if you mean sexy clothes in the process of sexual behavior, you can bring tools, work together on the spot, tie grass skirts with local materials or something (* ◎ *) to give you bad ideas; Take a bag with clothes and two pairs of running shoes in it, and then prepare a mask for everyone. After you take off your clothes, put all your clothes in your bag and keep things with you at all times. If this extremely embarrassing situation occurs, take a mask, step on your shoes, pick up your bag and run. As long as you can't see your face, you won't know your identity, but it's quite shameful to run away naked.
By the way, be careful of mosquitoes at night. As for the daytime, there are many wasteland overgrown with weeds in the suburbs of every city, often hundreds of meters. Some of these places will gather together, and some will be surrounded by farmland and country roads, so you can go.