If you’re like me, you’ll need to click this link to understand why the exchange turns out to be pretty danged funny.
Bob: “So, does anyone see any problems with this picture?”
Me: “YES! There’s a four f[*]cking liter bottle of picric acid!”
But clicking that link will be very profitable for you! You will learn something about chemistry. Including why it was perfectly grammatical and correct to insert the word ‘f[*]cking’ into that sentence. Indeed, said sentence could have used another one, between ‘picric’ and ‘acid.’ Short version: avoid poking around in collegiate chemistry labs. You’ll only see things that will highly upset you.