'Manspreading' has been banned on public transport in Madrid, with new signs being put up on buses.
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The transit agency in the Spanish city said it will post the signs on all buses asking men to keep to one seat and one seat only.
A similar campaign is planned for Madrid's Metro system.
Manspreading, for those who don't know, is when men spread their legs with no regard to others' personal space.
The move came after an online petition garnered 12,000 signatures.
Social media users have also taken to Twitter to vent their fury, using the hashtag #MadridSinManspreading.