A brothel in Germany hopes to capitalise on the growing number of pensioners by offering them a 50 percent discount for sex in the afternoon.

The "Pascha" in the western city of Cologne has introduced reduced rates for sex sessions for clients aged 66 and above -- provided they can prove they are old enough.

"All clients need to do is show us some proof of age," said a spokesman for the brothel's managing director Armin Lobscheid. "A 'normal session' costs 50 euros (34.20 pounds) with us -- and we're now paying 50 percent of that for these older guests."

"We don't earn as much money, but we're establishing ourselves across a broader range of age groups," he added.

After testing the water with reductions for senior citizens once a week, the Pascha decided earlier this month to offer 50 percent off sex services between midday and 5 p.m. every day.

"There's been plenty of demand and people have certainly been taking advantage of the offer," the spokesman said. "Older folks are more active than you think."

The brothel's Web site is keen to stress this point.

"Life begins at 66!" it says in an advert for its "senior citizens afternoon" next to a picture of a motorcycle rider.