Why are relationships so hard to get when it comes to boys?

throughout my life experience, billions of women across the world have learned that... Boys are completely clueless and have no idea how to take hints that u like them. They don't know when your flirting or not and it's even worse if your dropping hints for them to stop doing something you don't like.

Explanation:

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.