We thought we'd mysteriously gone back in time to April Fool's Day when we first heard about this, but no, it's a true story: lingerie label Lisca have developed a bra which works out when you're feeling, um, hot to trot, and adjusts your cleavage accordingly.
The bra apparently reacts to changes in body temperature brought on my sexual arousal, and changes shape to push the breasts together, making them look bigger. When your temperature drops, so do your boobs, with the cups loosening in reaction to the change in temperature.
These aren't available to buy just yet, but will sell for around £25 if and when the company finds a distributor. Would you buy one, though?[Source]