There may be private suites with double beds aboard Singapore Airlines' new A380 superjumbo jets. But that doesn't mean the airline is about to let customers join the "mile-high club."

The airline — which is majority owned by the Singapore government — says it will ask passengers to refrain from sex in its first-class suites, which are home to the world's first airborne full-sized beds.

Singapore Airlines' suites in its Airbus A380 superjumbo include a first-class double bed with door.
(Roslan Rahman/AFP/Getty Images)

"All we ask of customers, wherever they are on our aircraft, is to observe standards that don't cause offence to other customers and crew,'' the airline told Reuters in a statement.

The cabins may look private, but they are not completely sealed as the walls don't go all the way up to the ceiling. That also means the suites are not soundproof. 

Singapore Airlines inaugurated commercial flights of its A380 service between Singapore and Sydney, Australia, last week.

The first couple to fly aboard the new suites — Tony and Julie Elwood of Perth, Australia — were not impressed when told of the "no sex" rule this week.

"So they’ll sell you a double bed, and give you privacy and endless champagne — and then say you can’t do what comes naturally?" Tony Elwood, 76, told London's The Times.

A promotional video advertising the luxury suites on Singapore Airlines' website invites passengers to "experience unprecedented levels of privacy."

That experience, though, will apparently have its limits.