I kinda agree with the Doc in VOY about Vulcans being very tight lipped about the Pon Farr.
EMH: For such an intellectually enlightened race, Vulcans have a remarkably Victorian attitude about sex.
TUVOK: That is a very human judgement, Doctor.
EMH: Then here's a Vulcan one. I fail to see the logic in perpetuating ignorance about a basic biological function.