I have no idea what the relationship between this Chimpanzee and man is but it's obvious they care for each other very much.
The man appears to be having a birthday party and is opening his presents. One of the gifts is a chimpanzee mask and when he puts it on the real chimpanzee likes it so much she gives him a kiss. All the kids and the man seemed to enjoy this show of affection from what appears to be a very loving and loved chimpanzee. Hope this brings a smile to your face! If you enjoyed this see why Gorillas Prefer Blondes.