<p>The day that Tank met Bay in art class was the worst day of his life. Anyone disagree? She made him quit his frat. She didn't really want sex with him when they were together...she just used him as a big soft toy to tell her problems to...then she cheats on him with Emmet...then when they fight about it she tries to shift blame (as usual). Then later in season 4 when she has a little fight with Emmett, she gets wasted at a dorm party having fun with Tank, and they have consensual sex. The next morning she wakes up with a hang-over with no memory of the previous night except some eventual flashes of memories of the party. She knows what she did was wrong, so as usual Bay tries to drag someone else down for the blame and Tank ends up expelled while friends and family surround Bay like she's been raped or something. When she finally tells Emmett the truth, at least he has enough sense to see it for what it was. Anyway, that's why Tank's worst day was when he met Bay in art class.
</p>
(Edited by Captain Sketch)