Male fruit fly is on left

I encountered these flies along the shore of a small lake. They were engaged in a courtship ritual - the male was following the female around like a puppy dog - it was comical the way he stuck right on her tail. But every once in awhile, the female would turn around and the male would hold his wings toward her, in a sort of embrace, I imagined, and they would touch head-to-head. Kissing flies. What will they think of next?

Adult Female Fruit Fly, Family Tephritidae