Heard casual relationships are very common amongst PGs.Is it true?
Yes. A ‘Good Doctor’ working as ‘The Resident’ reading ‘Grey’s Anatomy’ says so. American web series YES. Indian 
Clinical PGs are overburdened with so much workload that Casual thoughts are a rarity too 
. Rest is one’s luck!
Casual relationship and never constant in residency:
Radio- contrast
Derma- acne
Medicine- total count
Anesthesia- ABG
Surgery- Appendicitis
Gynae- Ectopic
Ortho- Supracondylar