When the boys start calling for Teresa, the girls want to know what the big deal is. Tully tells them it's because she had sex with her boyfriend, and M.E. and Rene act completely clueless, even though they started finding out about sex in "It's Who You Sleep With".
When Teresa and her boyfriend are seen stepping out of his car, Rene exclaims "She's naked!" and M.E. responds "So's he! Is that what y'all look like?", even though we can see the waistband of the boyfriend's boxers. Previously, M.E. mentioned going down to the swimming hole to look at naked boys, so why would she be surprised when she saw Teresa's boyfriend?