Usually used when you type it in the space bar of the computer because you are lonely. Or used when texting that special someone. When viewed sideways, appears to be the 3 ingredient peanut butter roll of a heart.

Used in an expression of love. I less than three you baby! Some people use this as a heart, but those people are wrong. It is a mathematically way to define a couple. Two people tend to be a couplewell you can do the math.