I love those catchy titles. It's not something like "The Molecular Basis of Taste Perception in Mammals: A Comprehensive Review and Future Perspectives on Taste Receptors in Male Reproduction"
Nah, they go with: "Taste perception: from the tongue to the testis"
Short and concise to the point. Scientists have a sense of humorous wordplays after all.
I don't tip as well. But I live in a civilised country where everyone gets at least a tolerable minimum wage. No one is paying me extra money just for doing my job. So I won't either. If they want more, they need to talk to their employer. It's not my responsibility.
Would I live in the United States of Idiots though, where a severe lack of ethical economic behaviour is observable, I indeed would tip the waiters, as that's sadly their financial lifeline.