Screwloose, the notoriously screwy pony, has been getting better. She's been seeing a therapist, Dr. Hornwinkle, and he is pleased with her progress. She has been building relationships, fitting in, attending therapy sessions regularly, and speaking pony-speak instead of barking.
Dr. Hornwinkle suggests during one session that she tries dating, to see if she can finally integrate into pony society.
Alas, the pressure is too much and Screwloose suffers a bit of a relapse.