Assertion: penis | /r/CapableOf | become hard
Facets:
Source sentences:
text: It is the flow of blood that helps penis become stiff and hard, and it depends on the health of veins and tissues of the penile area on how long they can hold this blood together to perform sexual intercourse.
text: An erection is when your penis fills with blood and becomes hard.
text: Think about it: What is it that causes your penis to become hard when erect?