Ok I can not see how I can be on Lush without making some input on the topic regarding Klingon Sex.
First there are some very misguided and common misconceptions regarding Klingon Sex, or nga'chuq. A lot of human's consider nga'chuq just some form of S&M but it is much more than that, nga'chuq is very important in a romantic relationship of a Klingon. First for the IoD (man) he must be well versed in Klingon poetry and it is a distinct advantage if you have studied mellota' Klingon opera. It is extremely important that both IoD (man) and be' (woman) must are educated in how best to stimulate their partners.
It is true that biting and pain are important part of the process. There is a common expression in Klingon culture yIn DayajmeH 'oy' yISIQ [To understand life, endure pain] and this is certainly true for nga'chuqas [Klingon Sex]. Klingon mating rituals involve dominative and combative attitudes and rituals. It is considered a good omen if during the wedding night a clavicle is broken.
If your interested in understand this topic further there is a excellent resource, use this link to read the Klingon Sex Manual by Spiletta42
Warning: Klingon sexual practices may be potentially dangerous to humans. This work is not intended as a cure for any disease and has not been approved by the FDA. Please, for the love of Kahless, don't try this at home!
NOTE: In the interests of getting to the fundamental sexual practices navigate down past all the intro stuff to the bold instructions starting with "So you're dating a Klingon. Congratulations!" This is Sex Manual and does go into explicated details.