Most of the couples have no idea that their sex lives are in better shape than they think - even with the occasional off-night or dry spell.
Dr Jennifer Berman is the director of the Berman Women's Wellness Center and the author of For Women Only. She has busted the top four myths surrounding sex that couples shouldn't believe.
The first myth is that both need to be in the mood. The fact is that it is normal for sex to be a little ho-hum for one or both spouses up to 15 percent of the time, Fox News reported.
Many factors can throw things a bit off-kilter: timing, your mood or the partner's, the amount of foreplay, life stresses, you name it but rather than postponing it, have sex when you can - and don't interpret an off night as a sign of a failing relationship.
The second myth is that the best sex is spontaneous, expecting sex to just happen at the spur-of-the-moment can lead to long dry spells, whereas writing it in on the calendar is a show of commitment; plus, it gives the couple something to anticipate.
The third myth is that a couple should have sex three times a week. Having sex regularly nourishes a relationship, but couples shouldn't get too caught up in the counting, as most happy couples don't have sex every day or even two or three times a week.
The fourth myth is that good sex is long and slow but few people can afford the luxury of leisurely sex, in fact most of the people secretly think it sounds like more work after an exhausting day and holding out for the ideal moment can lead to infrequent or worse, vacation-only sex.