Mars and Venus were named by folks whose best instrument was the naked eye.
Venus, it turns out, is hot and steamy.
Mars is covered in iron oxide and scars, as if enormous armies of metal golems fought a war with cataclysmic weapons. Equivalently as if every square foot of soil was soaked with hemoglobin.
Venus, the pure female, can't let anything go. So insular it's impossible to survive there.
Mars, the pure male, was too outgoing and explored so hard it couldn't get back.