People wearing no pants take a selfie as they participate in the worldwide event “No Pants Subway Ride” in Berlin, Germany, January 13, 2019. (Photo by Clemens Bilan/EPA/EFE/Rex Features/Shutterstock)





People on the Underground as they take part in the No Trousers Tube Ride, in London on January 13, 2019. (Photo by Dominic Lipinski/PA Images via Getty Images)





Passengers react to a man seated beside them without pants during the 18th annual No Pants Subway Ride, January 13, 2019, in New York. (Photo by Kathy Willens/AP Photo)





Two women pose for a photograph with a pair of New York City police officers at the Union Square station at the culmination of the 18th annual No Pants Subway Ride, January 13, 2019, in New York. (Photo by Kathy Willens/AP Photo)





Young people wearing no pants participate in the “No Pants Subway Ride” in Prague, Czech Republic, 13 January 2019. (Photo by Martin Divisek/EPA/EFE)





People wearing no pants participate in the worldwide event “No Pants Subway Ride” in Berlin, Germany, January 13, 2019. (Photo by Clemens Bilan/EPA/EFE/Rex Features/Shutterstock)





Leon Feingold, left, and Patrizia Calvio wait for a train, minus their pants, at the West 4th Street Station during the 18th annual No Pants Subway Ride, January 13, 2019, in New York. (Photo by Kathy Willens/AP Photo)





Young people wearing no pants participate in the “No Pants Subway Ride” in Prague, Czech Republic, 13 January 2019. No Pants Subway Ride is an annual global event started in New York, USA in 2002. (Photo by Martin Divisek/EPA/EFE)





People on an escalator on the Underground as they take part in the No Trousers Tube Ride, in London on January 13, 2019. (Photo by Dominic Lipinski/PA Images via Getty Images)





Passengers wear no trousers during the No Pants Subway Ride in Amsterdam, The Netherlands, 13 January 2019. (Photo by Olaf Kraak/EPA/EFE/Rex Features/Shutterstock)





People wearing no pants participate in the worldwide event “No Pants Subway Ride” in Berlin, Germany, January 13, 2019. (Photo by Clemens Bilan/EPA/EFE/Rex Features/Shutterstock)





Young people wearing no pants participate in the “No Pants Subway Ride” in Prague, Czech Republic, 13 January 2019. No Pants Subway Ride is an annual global event started in New York, USA in 2002. (Photo by Martin Divisek/EPA/EFE)





People on the Underground as they take part in the No Trousers Tube Ride, in London on January 13, 2019. (Photo by Dominic Lipinski/PA Images via Getty Images)





Passengers wear no trousers during the No Pants Subway Ride in Amsterdam, The Netherlands, 13 January 2019. (Photo by Olaf Kraak/EPA/EFE/Rex Features/Shutterstock)





Leon Feingold, right, drops his jeans as his girlfriend Patrizia Calvio looks in her purse on the uptown E Train during the 18th annual No Pants Subway Ride, January 13, 2019, in New York. (Photo by Kathy Willens/AP Photo)





People on the Underground as they take part in the No Trousers Tube Ride, in London on January 13, 2019. (Photo by Dominic Lipinski/PA Images via Getty Images)





Young people wearing no pants participate in the “No Pants Subway Ride” in Prague, Czech Republic, 13 January 2019. (Photo by Martin Divisek/EPA/EFE)





People wearing no pants participate in the worldwide event “No Pants Subway Ride” in Berlin,Germany, January 13, 2019. (Photo by Clemens Bilan/EPA/EFE/Rex Features/Shutterstock)





A man rides the F subway line during the 18th annual No Pants subway ride on January 13, 2019 in New York City. 24 cities participate in the annual event arranged by Improv Everywhere a New York city based comedy collective. (Photo by David “Dee” Delgado/Getty Images)





Young people wearing no pants participate in the “No Pants Subway Ride” in New York City, 13 January 2019. No Pants Subway Ride is an annual global event started in New York, USA in 2002. (Photo by William Volcov/ZUMA Press)





Men and women stand in the subway wearing no pants when they participate in the 18th annual No Pants Subway Ride in New York City on January 13, 2019. Similar rides and events also take place around the world today. (Photo by John Angelillo/UPI Photograph/Barcroft Images)