1.
First, when Michael and Jan hooked up on vacation while she was his boss on The Office:
2.
When Archie and Veronica had shower sex right after his dad was shot on Riverdale.
3.
When Crosby cheated on Jasmine with his nephew Max's behavioral aide on Parenthood:
4.
When Polo and Ander hooked up while Guzmán was sleeping right next to them on Elite:
6.
When Ross immediately hooked up with someone else while he and Rachel were "on a break" on Friends:
7.
When Ryan hooked up with Kelly the day before Valentine's Day on The Office:
8.
When Annie slept with Liam while she was still dating his brother on 90210:
9.
When Alexis and Mutt hooked up right after Ted proposed to her on Schitt's Creek:
10.
When Lucas had a one-night stand with Nicki, the mother of his friend Jake's baby, on a carousel at the mall on One Tree Hill:
11.
When Veronica hooked up with Reggie to deal with the news of her parents' divorce on Riverdale:
12.
When Julie slept with her daughter's ex-boyfriend Luke (who was in high school!) on The O.C.:
13.
When Rory and Dean slept together while he was married on Gilmore Girls:
14.
When Omar cheated on Ander (who was going through chemotherapy) with his sister's boyfriend on Elite:
15.
When Zig and Maya decided to take Molly and have sex for the first time on Degrassi: The Next Generation:
16.
When Dan and his girlfriend had a threesome with his best friend Vanessa, who was also his girlfriend's roommate:
17.
When Meredith and George hooked up while they were roommates on Grey's Anatomy:
18.
When Miles slept with Tristan even though Tristan had just called him a "man whore" on Degrassi: Next Class:
19.
And finally, when Schmidt ended up in the hospital with a broken penis after hooking up with Nadia on New Girl: