Manspreading on trains is when dudes throw their legs wide open and take up a ton of space.
It's a real bugbear for a lot of people, and even the New York Subway has signs saying keep 'em shut fellas.
So, we've established it's bad on public transportation, but guess what? It's actually good for dating.
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A new study is saying that men spread their legs in pictures are seen as more desirable.
The researchers used a Tinder-style set-up to test what their subjects found more attractive, and people who were looser with their body language got more positive reactions.
The thought process behind it is that being looser makes you seem more open and dominant.
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The scientists at the University of California nailed the importance of a study like this. It's because, in terms of finding a partner, using apps or meeting people online is now second to meeting people through friends - so start relaxing and being more 'open' if you're looking for love.