At my school Lavaliering someone isnt taken lightly its the step before engagement. My boyfriend lavaliered me a year into his fraternity, there was only 1 other lavaliered girlfriend of the time. We also had been dating for 4 years- a year after that he proposed at his formal (something everyone else knew and I didnt- but I know I wasnt suppose to know)
In his chapter its meant for girls that you are going to marry. If you end up breaking up with the girl you swallow your lavalier. So the boys make sure not to lavalier just anyone
They also get thrown into a lake for taking the plunge
Each fraternity on campus has their own thing for lavaliering someone though.
We do a candle lighting in my sorority for being lavaliered.