Why Women Don't Directly Falls Asleep After Having Sex?

After having sexual relations man usually falls asleep. But for some women, after the sex they would choose to do the housework. What cause these?

Apparently the cause of women stay awake after having sex is a chemical substance from the male sperm itself. Conditions were also found in research on fruit flies. Male flies will go straight to bed shortly after fertilization while the female fly will directly move and go do something after the fertilization process is complete. Researchers suspect that there is a chemical substance called sex peptide or protein on sperm that affect men after sex. Sex peptide is also found in fruit flies. Fruit flies are widely used as experimental material about sex because they have factors in common with humans.

"Not just a regular activity, activities undertaken after the fertilized female fly is a form of voluntary behavior. But the real key is the sex peptide substance contained in the sperm of male flies," said Professor Elwyn Isaac of the University of Leeds, as reported by Dailytelegraph. Professor Isaac says that female flies are paired with male flies that produce the sex peptide in the sperm usually will experience this condition. "Just as with humans, men who have sex peptide substances in sperm tend to have a partner who directly work on another activity after sex like doing the housework, while he himself fell asleep immediately. These chemicals in the male sperm that was what turned out to encourage women to stay awake after having sex, "said Professor Isaac