Rebecca tells Heather "But I'm older than you!". In real life, Rachel Bloom is two years younger than Vella Lovell.
In the song "Sex with a Stranger," there are lyrics referring to a man's malodorous nether-region. This raised red flags with network's standards and practices department, so to work around it (with blatant innuendo), the writers gave Jason's character a condition which forced him to exercise his hands with carpal tunnel balls.