When Urban Dictionary makes an attempt at humour by putting more fake downvotes to make it seem as though there are more downvotes for the definition of this word than upvotes.
A button you can click if you disagree with the information or disliked something. It can also give you the temptaion to dislike when you liked it because so many people disliked or downvoted it.
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.