The idea that girls have a specific liking for such stories is a broad and inaccurate assumption. Interests in any form of literature or storytelling are shaped by a multitude of factors that are unique to each person and cannot be attributed to gender alone.
It varies from girl to girl. There are girls who are interested in such stories perhaps because they are exploring aspects of human relationships and intimacy. However, many girls may find such stories inappropriate or not in line with their tastes, especially those with more conservative outlooks.
No, it is not appropriate at all. Such content involves vulgar and inappropriate sexual implications which violate moral and ethical standards. We should focus on positive, respectful and family - friendly topics in communication.