Night threesome on the outskirts of the city with big-assed strangers

It all happened on the outskirts of the city at a very late hour. Two girlfriends, swinging their asses from side to side, walked in the fresh air and enjoyed their privacy and nice conversation. True, this conversation did not last too long, and soon a bloke in a jacket approached the girls to introduce himself. It only took a few minutes for this holy trinity to understand that between the three of them they had only one desire. And this desire is to have a hot threesome! They performed it there, right on the ground. Why so-and-so?