But researchers have found that both sea lions and bonobos are also capable of bopping to abeat.

但是，研究人员发现，海狮和倭黑猩猩也有乐感。

The courtship of a sun bear is quite spectacular they will show such behaviour as hugging , play fighting and even head bopping with each other.

马来熊的求爱过程是十分壮观的，牠们会显示出拥抱、打斗游戏、甚至互相撞头的行为。