Ms Suzuki says the pillow has other advantages

The Boyfriend's Arm Pillow, shaped like a man's torso with one sturdy arm, has been on sale since December and has so far been snapped up by 1,000 singles.

Manufacturer Kameo said the pillow's shape also keeps the body balanced.

One woman, Junko Suzuki, told AP: "It makes me relaxed... I can hold the arm and feel something warm at my side".

The pillow is only available in Japan, where it costs about 8,500 Yen (£40, $80), and is available in blue, pink or green.

Ms Suzuki, who is separated from her husband, says the pillow has other advantages.

"It keeps holding me all the way through. I think this is great because this does not betray me," she told AP.