A புறத் திணை in this scheme: mismatched or unfitting love - a pairing seen as unsuitable, such as too great an age gap - grouped here alongside கைக்கிளை as love outside the 5 landscape திணை.

பெருந்திணை was traditionally used to gently mock or caution against a pairing the community saw as unwise - poetry doing the work of social commentary.

A love pairing seen as socially mismatched, like a large age gap.