It’s the first day of school, and Mrs. Lizzie Love gets straight to business with her Health 101 class. Her students, Liz Jordan and her boyfriend Celtic, aren’t too happy about this, so they decide to mess around behind the teacher’s back. They’re really sexual towards each other, and when Mrs. Love finds out, she realizes her students don’t know as much about sex as they think. Liz and her boyfriend assure her that they’re experts, so the teacher offers them a deal: if they can prove they’re such experts, she won’t give them any tests in the whole school year, but if they fail, then they’ll have to write a paper. Liz and her boyfriend don’t want any homework, and they definitely don’t want any tests either, so they bring their A-game for this spontaneous sex class. Will it be enough? Only this horny teacher can decide.

Rico convence a Donnie, su padre, de que su nueva madrastra, Lizzie Love, es una aprovechada y no contribuye a su hogar. Los muchachos deciden idear algunas reglas nuevas para que ella las siga si quiere seguir siendo parte de la familia. Después de la conmoción inicial, Lizzie descubre que un poco de uso gratuito podría ser la contribución exacta que la casa necesita desesperadamente.