![Are you a 'REAL woman'? Try the 'Under Boob Pen Challenge' craze to find out | World | News | Express.co.uk Are you a 'REAL woman'? Try the 'Under Boob Pen Challenge' craze to find out | World | News | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/78/590x/secondary/asd-443749.jpg)
Are you a 'REAL woman'? Try the 'Under Boob Pen Challenge' craze to find out | World | News | Express.co.uk
![La Mega Medellin al Twitter: "Underboob Pen Challenge, la nueva tendencia en Instagram https://t.co/nk4BVrWpuz https://t.co/vFWtcyGuyR" / Twitter La Mega Medellin al Twitter: "Underboob Pen Challenge, la nueva tendencia en Instagram https://t.co/nk4BVrWpuz https://t.co/vFWtcyGuyR" / Twitter](https://pbs.twimg.com/media/CZvkioOVAAAxzFh.jpg)
La Mega Medellin al Twitter: "Underboob Pen Challenge, la nueva tendencia en Instagram https://t.co/nk4BVrWpuz https://t.co/vFWtcyGuyR" / Twitter
Putting a pen under your boobs is the latest 'beauty' test | news.com.au — Australia's leading news site
![Are you a 'REAL woman'? Try the 'Under Boob Pen Challenge' craze to find out | World | News | Express.co.uk Are you a 'REAL woman'? Try the 'Under Boob Pen Challenge' craze to find out | World | News | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/78/590x/secondary/asd-443751.jpg)