Old young chemistry

Perfectly shaped blonde teen Barbie White is having a private chemistry exam today for her pass on the subject. If she doesn't succeed she will have to repeat the year so she's devoted enough to it. Unfortunately she's a real dumber and doesn't understand anything about compounds and bonds so she decided to go the other way. She noticed that her teacher Yogi was staring at her long legs and nice titties during the lessons so now she has a good offer for him...