The survey, of 4,000 Brits by internet giant lastminute.com, found that while men think about sex 150 minutes in every 24 hours, women on the other hand, spend 180 minutes per day thinking about getting hot and heavy.

You don't need a lie detector test to find out if someone's lying to you --just check out these seven signs of lying.

1. No eye contact - Generally, if someone is lying they will not look you in the eye, at least during a certain part of the conversation. Normally, people make eye contact for at least half of a conversation, so anything less than this could be suspicious. One caveat: there are some people who will take great pains to make eye contact with you even if they're lying, simply to make you think they're not.

2. Change in voice - A change in the pitch of a person's tone, or a lot of stammering (umm, ah), or throat clearing could indicate a lie.

3. Unusual body language - If a person taps their foot a lot, fidgets with their hands, raises their shoulders, turns away from you or brings their hand to their face (to touch their chin or nose, etc.) -- in other words, if they act nervous or uncomfortable -- it could mean they're telling a lie. Also watch out for blushing (or becoming pale) and increased blinking.

4. Something sounds fishy - Making statements that contradict each other, are inconsistent or don't sound quite right are usually part of a lie.

5. Overly defensive - Sometimes when a person is lying they will become extremely defensive, refusing to answer any questions and even accusing you of lying. This may mean they have something to hide.

6. Changes subject easily - If someone is lying and you change the subject, chances are high that they'll go right along with it. A person telling the truth, however, will likely ask why you changed the subject and want to go back to it.

7. Humor or sarcasm - A guilty person will often try to change the subject using humor or sarcasm.

Many of the same things that are good for a man's heart may also be good for his sex life, new research confirms. Maintaining a healthy weight, not smoking and getting regular exercise may all reduce the risk of developing erectile dysfunction (ED), according to a study that followed more than 22,000 US men for 14 years.

Anything that impairs blood vessel function and blood flow could affect erectile function, and it's known that certain medical conditions that raise the risk of heart disease -- like high blood pressure and diabetes - can also lead to ED.

Similarly, the lifestyle choices that affect cardiovascular health, like smoking and exercise habits, influence ED risk.

One or more of the following reasons usually account for why a man sleeps after Sex:

• They are tired to begin with, and sex helps them relax and let go -- figuratively and literally.

• The hormones men and women produce at orgasm can lead to the desire to lay back in the afterglow, and that sense of physical peace often leads to sleep.

• The ejaculatory release for men, and the inherent letting down of bodily tension, makes men physically tired.

• Most people (again, men and women) hold their breath during sex, breathe shallowly or don't focus on breathing. I'll bet the ranch that he's not breathing deeply. That gives him oxygen deprivation, which causes sleepiness. And, it could (rare, though) persist into the next day.