Boy meets girl. Boy flirts with girl. Boy gets girl. Boy continues to flirt with other girls. WTF?
From Wikipedia: Flirting or coquetry is a sexual activity involving verbal or written communication as well as body language by one person to another, suggesting an interest in a deeper relationship with the other person. In most cultures, it is socially disapproved for a person to make explicitly sexual advances, but indirect or suggestive advances (ie., flirting) may at times be considered acceptable.