I sent this having only had a quick look at it and going ahh. Have now seen it all and I agree, Petallus, keeping monkeys as pets is NOT a good thing. There was a chimp at Ed Zoo called Mickey, who came there when he was about 4 or 5 years old, after being kept as a pet by sailors. He was now too big to control. He had never learnt how to be a chimp, and was regarded by the rest of his troupe as one banana short of a square meal. He loved human attention, and would leap up and down and bang on the glass to get it. He was most useful in the group as a babysitter, as he loved to play like a youngster. Physically he was a fine animal, and had he grown up as he should, he would have graduated to be the leader, and fathered a lot of babies, but when he died at the great age of 50 none of his genes were passed on to the next generation, as he could not relate to the adult female chimps the way he should.
Monkeys are not babies. Little monkeys are used to being licked by their mothers to keep thwm clean, I can't see a human doing that for him. If one is being hand reared, then a minimal amount of washing/bathing for hygeine is fine, but that bath went on too long and the owner was enjoying it more than the monkey - though it did look happy when dried and cuddled up in the towel, glad it was over perhaps.
Those grinning faces he made were like the ones made by adult monkeys and chimps when they are threatening one another.
The other videos I have linked to were made by professionals studying animal behaviour. They do not treat them as surrogate children, and the animals lives are lived with others of their species, relating to each other as they naturally would.