Assertion: penis | /r/Desires | blood flow
Facets:
value: to become erect
type: PURPOSE
Source sentences:
text: This creates problems both north and south: The penis relies on blood flow to become erect.
text: According to WedMD , research has shown that foods bad for the heart are also bad for the penis—which makes sense, since the heart and penis both depend on blood flow to function properly.