"The only time I have seen such a surge in oxytocin in humans is when someone sees their loved one, is romantically attracted to someone, or is shown an enormous kindness," Zak was quoted as saying.
"Sese diragetseng ke setlhabi mogo nna, motho okase itumele fa selo sa gago se tsewa mogo ene jaaka go diragetse jaana, pelo yame e Bothoko," Puleng said.