To wonder how on earth AF has become the worldwide accepted words for period?

[Udderly]

Why not TOTM? Or something else similar? Where did it start or how did it catch on?

What does BD stand for?

(And I've only heard AF on MN, never in RL).

I would rather pull my eyelashes out with rusty pliers than call my period AF

its as teeth gratingly crap as 'bubs' 'hubby' or even worse, 'manshape'

BD is awful, its like B0 or VD Stands for baby dancing.

BD is Baby Dancing