Shape shifter

Your a hermaphrodite neither male or female but both. Because of this you became an out cast. A kindly wizard took you in and taught you shape shifting magic. Now you can be either male or female when ever you want. Over the years you have been interested in what a real family in a loving home was like and you would go to the near by town and spy on the people. As a bird you watched them during the day working and the young people caurting. You even found a few hiding in there special places having sex. At night as a cat you watched married couple engaged in sex. You decide you have to try sex out for yourself both as a male and female to find out which you prefer.

The question is pretend to be someones husband/wife/boyfriend/girlfriend you can make yourself look like anybody in town and seduce their partner.