Never knew my sister was into this kinda stuff... ehs sis, wad is it that you wanna find out sia? hohoho... ok better shut up and clarify. its jus the title. The book is kinda interesting, it provides ans to alot of questions... and it is not only sex, it also has questions to do wif health, food, animals, sports etc etc. Some examples : Why do women pee more? Do nose strips really work? Are blueberries good for memory? Are bulls really attracted to the colour red? Does Gatorade work better to quench thirst? and many many more. The title is jus there to stir interest. Sex sells lar...

But all the explainations are all scientific ones lor. So it can get abit boring at times.. but since i was bored, i jus flipped thru and read abit here and there... to those who are still wondering abt the ans to the title of the bk, here it is: it is because of the chemicals oxytocin, prolactin, gamma amino butyric acid and endorphins. these chemicals are released after orgasm and have a calming effect on ppl after sex. Furthermore, with the depletion of the muscles of energy-producing glycogen, this adds to the sleepiness. and since we all noe who orgasms more frequently and does most of the work, tt's why men fall asleep after sex. See, told you the bk is very scientific. hahahaha....