If you have served or are serving in the US Military, just hearing the term "BCG" will make you smirk. To the uninitiated, I present:

“Birth Control Glasses” or the abbreviated “BCG’s” This model was the standard-issue eyeglasses from the 1960’s – 80’s. US military personnel too dumb or cheap to buy their own eyewear were issued these rather unpopular glasses back then. We called them "Birth Control Glasses" because they made you so ugly no woman would come near you. I think David Dray liked his though.
Now, here’s the current version of army-issue “BCG’s” (Birth Control Glasses). We have modernized our entire arsenal since the 80’s - dumped the M-60 tank, the “jammin’ jennie” M-16, The F-4 Phantom, The jeep… you’d think they would come up with glasses that didn’t make a guy look like a complete tool…