One in five iPhone owners admits to frequently watching 'adult material' on their iPhones.

That's twice as many as BlackBerry owners, according to the Gadgetology report from online electronics retailer Retrevo, which surveyed 445 people.

What's more, one in three iPhone owners say that if their partner had out-of-date gadgets it would be a turnoff. And one in three iPhone owners has texted or emailed their significant other to break up.

Moreover, one in four iPhone users has broken up with their partner because that person spent too much time on their mobile device.

What a shallow bunch they are.