Season 8.

Slayers were powerful in fact they were one of the most powerful beings on the face of the earth, Because of that they were incredibly dominate in everything that they do especially when it came to sex. When Buffy first arrived in sunnydale high school she was prepared to find the town and school just like her old one but that all changed when she discovered that the town was home of a hellmouth which just so happened to rest right under the school library.

What was even better though was the loyal friends that she made, first was the shy and innocent Willow which Buffy decided that she wanted to keep shy and innocent for as long as possible, second was the queen of the school Cordelia Chase who reminded Buffy of herself before she was called as a slayer, the third was Giles her watcher who was more of a mentor then a friend, last but not least was Xander Harris who Buffy decided would become her new boy toy.

In her old school Buffy had a couple of boy toys who didn't really please her so in order to get the best pleasure possible she decided that she needed to train Xander.