With over 900,000 members, their research has indicated that men over the average height of 5ft 10 are more than twice as likely to cheat than their shorter counterparts.
Celebrities caught in extramarital tangles would seem to prove this theory. But then, it's hard to name a person in the public eye who has remained faithful to one partner for life. Money, fame, and the power that goes with it, seems to sway the balance between decency and temptation.
A spokesperson for married dating site, illicit encounters.com, Mike Taylor said: "Ladies might want to rethink the classic, tall dark and handsome requirements when looking for a loyal partner, as only 32% of the male members on Illicit Encounters are under 5ft 9.
"I think small man syndrome could mean that shorter men are not as confident with women. A number of females I know will not even look at a man under 6ft, even though they are shorter themselves.
"There is also a certain confidence that comes with height, and guys know that it gives them edge over shorter guys."
My second husband is taller than I am too, and he's remained faithful over our 25 years together.
However, every time I see a tall man, my spine straightens and I rise inches in stature.
What do you think about tall men? Does height make any difference to their fidelity?