that's abysmal

They're used mostly for astrology nowadays, but theres a symbol for each planet, as well as other objects in the Solar system :)

Most of them are pretty obscure to anyone who isn't obsessed with astrology, but the Mars and Venus ones specifically see a lot of use to mean male/female, respectively. I first saw them in the pokemon games lol

Those are the classical symbols for planets, dating from the late antiquity and used to represent the planets on charts since then. They have been associated with alchemical substances that people believed to be related to planets (and gods in the antiquity), like lead for Saturn for example. They are not really used in modern astronomy, though they can still be useful on charts. Of course, astrology still uses them, because this... discipline is the remnant of the non-scientific part of traditional astronomy...

Anyway, those symbols are shown on the wikipedia pages of planets, in the frame at the top of the page, quite hard to miss frankly.

Sorry to say that there is no pride in not knowing these, they are literally general knowledge.

Men are from Mars, Women are from Venus...

Same. I should have known but my addled brain couldn't straighten them out properly

As my above comment tells... So, you pretend to be "the last Roman" and you find that ridiculous? I hope you're joking ;).

I didn't know it represented Mars but I know the symbol is also used to represent men. It seemed reasonable that since "Men are from Mars, women are from Venus" the symbol for "men" would also be the symbol for Mars.

I infortunately listened to "Grenade" once. I wish I hadn't done that :3.

I expect you to get an 11 tomorrow.