It seems that some revellers at the world-famous San Fermin Running of the Bulls festival in Pamplona had one too many sangrias - and lost all their inhibitions.
Thousands of party-goers crammed into the streets of the northern Spanish town as the nine-day event got under way.
Red wine was thrown through the air in such quantities that the revelers - wearing the traditional uniform of all-white with red neckerchiefs - turned into a sea of pink. And women roared with laughter as they exposed themselves.
As the night went on romance was in the air and many in the drunk crowd coupled off.
The festival is notoriously marked by all-night partying and the Running of the Bulls event.
See below for the images….