According to a new survey, 40% of couples say they have sex three to four times a week.  That's two in five couples. But don't get too depressed if you're not there . . . this is for ALL couples, both married and people who still get-it-on all the time.

The next most-common answer was "a few times a month" which was given by one in four couples. 

• 7.5% of couples (one in 13) have sex EVERY DAY. 
• And 4.5% (about one in 22) said they NEVER have sex.  

They also found that a lot of us are HIDING SOMETHING.  43% of men and 33% of women say they're keeping a MAJOR secret from their partner.  That's two in five men, and a third of women. 

Even among the couples who say they're HAPPY, one in four are keeping secrets from each other.

Some of the other findings?

• Men are almost twice as likely as women to believe in love at first sight:  48% of guys have had it happen to them but only 28% of women have.
• TWO THIRDS of couples say that they do NOT sleep naked.