It is one of football's hottest debates; is sex a distraction or can a little bit of what players fancy help ease the strain and tension of World Cup competition?
The polemic resurfaced at the World Cup this week after British newspapers said the pitch-side presence of the Spanish goalkeeper's glamorous girlfriend was being blamed for Spain's shock 1-0 defeat by Switzerland.
"Sex isn't a problem. It's only a problem if they're doing it at two in the morning with a bottle of champagne on the go," team doctor Donato Villani said before coach Maradona and Co. set off for South Africa.
During Argentina's victorious 1986 World Cup campaign, coach Carlos Bilardo, a former gynecologist, said sex was fine as long as "the woman does the hard work".
Hosts South Africa have taken a similarly laid-back position, with the team coach giving a green light to conjugal visits from footballers' wives and girlfriends.
"We're not in prison or a military camp," Carlos Alberto Parreira said before The Boys' opening Group A clash.
"When they're on their own, they can do what they like. Not everyone likes sex, or wine, but everyone has to do whatever they like," he told a recent news conference.
Reinaldo Rueda, coach of Central American underdogs Honduras, has lamented that air tickets are too pricey for some of his players' partners to join them, while a Swiss team spokesman said many wives were simply too busy to come along.
Capello will only let England's players see their families one day a week, after matches. "We're going to South Africa to play, not for a holiday," he has said.
Some pundits blamed the WAGS' headline-grabbing antics at the last World Cup for the team's lacklustre performance and the country's Football Association will not be footing the bill for them to go to the tournament, as it did in 2006.
The Spanish players are under similar instructions, but that was not enough to avert the controversy over keeper Iker Casillas' girlfriend Sara Carbonero, a reporter who is covering the tournament for Spain's Telecinco channel.
Britain's The Times said a "Spanish inquisition" had erupted after Wednesday's upset, but commentators in Spain said it was absurd to blame the eye-catching presenter.
"Pinning the blame for Spain's defeat on Sara Carbonero is as infantile as claiming that Robert Green's inability to save the ball against the United States was because he was distracte
