Mating flies

The fly couple on Alex's car windshield. They were still joined together when the car was on the road. Eventually a long trailer passed by and the strong wind blew them away...

Last weekend, also by luck I saw a dragonfly couple (brown colour about an inch long) mating on dry grass. One on top, the other at the bottom, and their bottoms were joined. They stopped at a spot for some times, then flew to another spot, stopped a few minutes, again flew to another spot. Their body were still joined even when they flew (as I didn't see them re-attaching to each other after they reach the ground/grass). Only if I have camera that day...