Parts of our DNA that influence body shape - including the classic "apple" or "pear" shapes in women - have been revealed by scientists.
Using super-powerful electron microscopes, the boffins have identified the 13 genes - which seem to have a greater impact in women.
"It was just amazing," said Dr Nicolette Experiment. "We looked into these strands of DNA with our latest microscope and couldn't believe what we saw.
"There, among all the previously identfied genes, were tiny little apples and pears, just swimming around in the acid.
"It was really weird as we began spotting other shapes, and we're not sure yet what effect all of them may have. For example, we spotted one that looks like a penis, and we feel this may explain 'knob-headism.'
"But there was also one shaped like a Fender Stratocaster guitar and that remains a mystery."
The scientists' findings are published in Nature Genetics.