Sex can wake you up, it can help you sleep, it can even clear your sinuses, and now it can keep your mind from wandering, which is good news for daydreamers.
An iPhone app designed by psychologists to track moods asked users what they were feeling, thinking, and doing about three times a day. It found people daydream about 50 percent of the time and are usually unhappy while doing so. Could they just be daydreaming because they're unhappy? Not likely. The study found low moods came after daydreaming but not before.
Sex, though, proved to be the one activity that caused mind wandering to drop below 30 percent. Maybe that's why we should say yes to sex every time? Unless it's boring.