100 Women: The men being taught what harassment feels like
Classes in Nairobi aim to teach boys and young men what constitutes harassment - and how to intervene if they spot it happening on public transport.
The people behind the Kenyan scheme say it's been successful but does it have an effect outside of the classroom?
Video Journalist: Horaci Garcia
BBC 100 Women names 100 influential and inspirational women around the world every year. In 2017, we're challenging them to tackle four of the biggest problems facing women today - the glass ceiling, female illiteracy, harassment in public spaces and sexism in sport.