Hugging and kissing to show love. Younger chimpanzees have been known to throw temper tantrums. Males do not help in raising young. Females are actually frightened of the males harming their young. Cases of males and females performing infanticide is common.
Males kill their own young, and females kill the offspring of other females.
Adult and young chimpanzees show curiosity towards new and different things. The comparisons above show the similarities between motherhood and children of both species. Human and chimpanzee children do many of the same things, including temper tantrums. Human mothers are not the only mothers who have to deal with their children throwing those temper tantrums. Curiosity is a common trait as is strong bonds and touch.