>
This is a friendly reminder to read our rules.
Remember, /r/Showerthoughts is for showerthoughts, not "thoughts had in the shower!"
(For an explanation of what a "showerthought" is, please read this page.)
Rule-breaking posts may result in bans. >

Two hydrogen atoms and one oxygen atom fused in a molecule will hydrate you, but neither hydrogen nor oxygen will hydrate you on their own. >

Everything that requires more than one component would fall into this category. >

Glass with empty space behind it will definitely show your reflection if the space behind it is dark and the space behind you is light.