I think YMMV is a mix of how good you take care of yourself. basically having a clean appearance (shaved, trimmed), respectful attitude, smiley face, well dressed, well groomed, humor, fit, it all kinda adds up. It the same for us, we all want beautiful women, nice body nice booty nice legs nice lips makes us harder, same for the girls~
If we allow them to enjoy more while doing their work, they will make us enjoy more, same deal