Communication is key.

Everyone wants to know the secret to great sex — and there are plenty of experts out there who are only too happy to provide what they believe is the answer.

But one — octogenarian human sexuality professor Dr. William Yarber — says that the secret is no secret at all.

A quick discussion with your partner, Yarber insists, is all that’s needed. Their response to a simple question — “How do you like to be touched?” is the answer you’re looking for.

He claims those who want their partner and themselves to be sexually satisfied — and who doesn’t? — needs to ask this of whoever slips into their sheets.

Then get it on — however you and your partner like.

“The essence of sexuality is giving and receiving pleasurable touch,” Yarber explained to CNN.

Also recently, a group of scientists claim to have found the definition of “great sex.”

A new study, published in the journal Sexuality & Culture says there are three factors that contribute to sizzling sexual congress.

Researchers from Missouri State University conducted interviews with 78 sexually active participants of varying ages, backgrounds and sexual orientations to define what makes a sexual experience above average.

The study found most people agree that orgasm, emotional connection and chemistry are all important.

The majority of participants said orgasms are an essential element of their sexual experiences.

Some focused on their own orgasms, while others considered mutual orgasms a key component.

Some women even required multiple orgasms to consider sex “great.”

Yet, 20 participants shrugged off orgasms as unnecessary.

Although more difficult to define, an emotional connection was the second most-important factor for exceptional sex.

Many participants were sure to clarify that an emotional connection can exist without romantic love, but eight participants specifically equated an emotional component with love.

On the contrary, 16 participants did not require an emotional connection for superb sex.

Another abstract yet important factor for “great sex” is chemistry.

While elusive, chemistry was generally agreed to require an emotional and physical response that “is either there or it is not there.”

Participants explained that chemistry allowed them to like and trust the person enough to “let go and be present,” which allowed them to focus on their own pleasure.

While there were some common themes and conversations, overall the study found that the elements that contribute to a satisfactory sexual experience vary widely, as “great sex” is difficult to define.