I won't try to start new fads or fashions.
One of the hottest current fads is to buy inexpensive thongs and decorate them yourself.
If a is the surface density and dS an element of surface, then fadS is the whole charge, and hence afV adS is the expression for the energy of charge of a conductor.
Are today's environmental concerns really a big deal or just fashionable fads?
In those days, before health scares and dietary fads, milk and milk shakes were the trendy drinks.