This term is use to describe a form of recreational social and sexual intercourse between consenting adults. Commonly consisting of male/female (or male/male) couples meeting with other males for sex and ongoing intimacy. It is simply being open about you sexual feelings and being adventurous about it; keeping the homies happy!
"Sharing is Caring" probably began since the dawn of time. From our history records at we can find some sort of written documents from the ancient Rome and its' orgies.
"Dude, I can't hang with you tonight" "WTF, why not?" "Lisa and I are going out." "Bring her over, sharing is caring!"