From The Telegraph

Photographer Cyril Ruoso captured the moment at Pandrillus Drill Sanctuary, Nigeria. He said: “It’s a funny shot. However, for the chimp his actions have a social meaning. Grooming or physical interaction is a way to show how close you are to another individual…. I once met an Orangutan in Borneo who loved to groom my hairy chest even when I was wearing a shirt.”

(via All Creatures)