Assertion: whale's forehead | /r/ObjectUse | used in all sperm whales
Facets:
value: between males
type: LOCATION
Source sentences:
text: Another theory says that the enlarged forehead caused by the presence of the spermaceti organ is used in all sperm whales between males fighting for females during mating season by head-butting each other, including Livyatan and the modern sperm whale.