Red-blooded men will spend £4.2 billion this year on 'hush-hush' sex behind their partners' backs - despite the credit crunch, it has been revealed.

Blokes will fritter away a fortune on strippers, saucy downloads for their mobiles and adult internet sites.

Racy satellite TV channels and paying for phone sex as well as erotic magazines and blue DVDs and videos will also cost them millions.

 A spokesman for www.onepoll.com, which polled 4,200 men, said: "The sex industry is clearly not being affected by the recession in any way."

"It seems men will find money to indulge in the world's most famous past-time whatever the economic climate."

The report also found frisky fellas use an array of crafty methods to gather the money for their adult fun to ensure wives and girlfriends never suspect a thing.

Guys are saving money in tins hidden in the garden shed, opening separate bank accounts and even fraudulently claiming extra expenses at work.

The survey revealed blokes spend the most money in strip clubs.

Almost a third (29 per cent) regularly visit strip clubs, with three trips a year emerging as the average.

Guys also fork out around £62 each trip, leading to a national spend in excess of £1.6 billion.

Erotic downloads to mobile phones are the second-biggest expense, with eight per cent of men - 1.8 million - paying for raunchy images every month, leading to an annual spend of £496 million.

More than one in ten men (13 per cent) have membership to adult websites and download a collective total of £387million a year.

Just over 1.5 million men (7 per cent) visit prostitutes around four times a year - spending #384 million - while another £356 million is being splashed out on phone sex.

Men in London spend the most on prostitutes, forking out £72 a time compared to the national average of £61 while guys in Newcastle use up the most money on adult chat lines.

Blokes in East Anglia fork out the highest amount buying adult content on the internet while guys in Liverpool splash out the biggest sums on erotic downloads for their phones.

However, almost a third of men are constantly worried their partner will find out about their sexy secret - and more than one in five insist they would be dumped if it came to light.