It's a matter of interspecies communication.
If a man says he doesn't need anything it means he doesn't need anything, if a woman says it that means the exact opposite.
Women are from the planet Contrary and they're all Contrarians. There is no known translation guide to the Contrarian language as the words and meanings change continuously and without apparent reason.
The offering of expensive gifts and flowery complements seems to be the only way to gain favor and avoid their wrath and even that's only tempers the beasts for a short time.