Being good in bed is a lot simpler than you think and it has nothing to do with penis sizes.
In fact, you might want to keep a close eye on how strong your handshake is, because it could reveal a lot about your performance in the sack.
According to a new study by Chonnam National University in South Korea when it comes down to penis function, the stronger the handshake, the better you are in the bedroom.
This is because researchers found that every 5kg increase in hand grip strength will relate to an 18% decrease in the likelihood of erectile dysfunction (ED).
Another reason was because of the declining testosterone which affects both over strength and penis performance.
Authors of the study said: “The principle finding of the present study was that men with lower hand grip strength had a higher risk of moderate to severe erectile dysfunction.
“Also our study demonstrated that erectile dysfunction was significantly associated with age, haemoglobin, self-related health and physical activity in ageing men.”
The research charted 1,771 men over the age of 50 and gauged the strength of their grip. Measurements of their erectile capabilities ranged from mild, mild to moderate, severe, to non-existent.
Handshakes were analysed using a mechanical dynamometer, which measures how much mass someone can compress incrementally by 5kg.
Men tend to weaken as they age which causes a number of health problems, including ED.
The research – which was published in science journal The Ageing Male – found: “Handgrip strength measured in a sitting position represent the muscle strength of forearm and upper extremities and measured in a standing position can include lower extremities and core muscle strength.”