What does Aspirin between the knees mean?

Aspirin between the knees meaning in Urban Dictionary

suggests that if a lady were to suspend an aspirin between the woman knees, she would be unable to distribute the woman legs without losing the aspirin, hence, by continuing to keep the aspirin suspended between her legs, she'd be unable to participate in tasks considered sinful by crazy out-of-touch right wing fan tasks who wish to enforce their particular spiritual might regarding the United states general public