A man takes part in the 2019 World Naked Bike Ride event in Toronto, Canada, June 8, 2019. The annual clothing-optional bike ride event drew dozens of participants to help raise people's awareness of environmental protection here on Saturday. (Xinhua/Zou Zheng)

Participants take part in the 2019 World Naked Bike Ride event in Toronto, Canada, June 8, 2019. The annual clothing-optional bike ride event drew dozens of participants to help raise people's awareness of environmental protection here on Saturday. (Xinhua/Zou Zheng)

Participants take part in the 2019 World Naked Bike Ride event in Toronto, Canada, June 8, 2019. The annual clothing-optional bike ride event drew dozens of participants to help raise people's awareness of environmental protection here on Saturday. (Xinhua/Zou Zheng)

Participants take part in the 2019 World Naked Bike Ride event in Toronto, Canada, June 8, 2019. The annual clothing-optional bike ride event drew dozens of participants to help raise people's awareness of environmental protection here on Saturday. (Xinhua/Zou Zheng)