Laurent Geslin / Bride and groom at a modern orthodox christian wedding, Gondhar, North Ethiopia, 2006

Franco Banfi / Sperm whale (Physeter macrocephalus) transparent chunk of skin in diver's hand, skin gets rubbed off when they socialise and groom each other by rubbing their massive bodies together, Dominica, Caribb...

Franco Banfi / Sperm whale (Physeter macrocephalus) transparent chunk of skin floating, skin gets rubbed off when they socialise and groom each other by rubbing their massive bodies together, Dominica, Caribbean Sea...

Michel Roggo / Visitors at Five Flower Lake, including bride and groom having wedding photographs taken. Jiuzhaigou National Park, Jiuzhaigou Valley Scenic and Historic Interest Area UNESCO World Heritage Site, Sich...

John & Mary-Lou Aitchison / Female European otter (Lutra lutra) rolling over on a rock and scent marking and letting her cub groom her, Scotland, UK, November.

Frederique Olivier / Cape petrel (Daption capense) trying to groom and bond with its partner, Antarctica.

Frederique Olivier / Cape petrel (Daption capense) trying to groom and bond with its partner, Antarctica.

Luke Massey / Pair of Yellow baboons (Papio cynocephalus) groom their youngsters. South Luangwa NP, Zambia.

Tony Phelps / Chacma baboon (Papio ursinus) female grooming female. DeHoop Nature Reserve, Western Cape, South Afgrica.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) juvenile male 'Gimli' aged 7 years playing while the rest of the 'G' family rest and groom. Gombe National Park, Tanzania.

Aflo / Pinecone fish (Monocentris japonica) fry amongst coral, Izu, Shizuoka, Japan. March.

Anup Shah / Tana mangabey (Cercocebus galeritus) baby -3 months old plays alone in a tree while others groom. Tana River Forest, South eastern Kenya.