Look, hot men posting thirst-traps on Instagram under the guise of celebrating a serious event is obviously one of the scourges of the 21st century: But there's no denying that in rare cases, they can keep your eyes focused firmly on your screen rather than rolling into the back of your head.
One such exception is that of 'world's hottest maths teacher' and model Pietro Boselli, who celebrated Earth Day on Monday (22 April) by getting back to nature with a series of jaw-dropping nude images on Instagram.
With just a carefully-placed shell to protect his modesty, the former University College London lecturer left followers shell-shocked (sorry) as he stripped off in honour of the international day of environmental activism, (which you can find out more about here).
First held in 1970, Earth Day is observed each year on 22 April, and organisers claim over a billion people now participate in activities to help educate people about the environmental challenges the globe faces.
As for Pietro, well, as far as awareness-raising goes, we can certainly think of worse ways to get our attention - just promise us you'll all go recycle your plastics after you're done drooling...
Meanwhile, you can check out more of Pietro's hottest moments here.