Back in the
day (it was a Wednesday, I
don't know if you knew that), a thumbs up sign was used to symbolize the male
penis. Similarly, a heart was used to smybolize the female vagina. <3 does not mean "heart" or "love", it means "vagina".
When rearranged, the "<3" sign can mean various forms of intercourse:
3< = butt sex
>3 = ear sex