An unbreakable law which states that when something cute is present, every woman and every feminine male within 30 feet of the cuteness MUST react with "awww!", "how cute!" or "adorable!!!" Similar reactions are also acceptable, but must somehow express how cute the thing is.
The law may exist because women and feminine men are considered "more empathetic" than is typical, so they...on second thought, there is no logical explanation.
Tony present Tina and her friends with a picture of his cat wearing little boots.
Girl 1: AWWW!
Girl 2: That is SOOO cute!
Girl 3: I just want to hug it!!!!
Feminine Male: That is the most adorable thing i've ever seen!!!
Tony and his friends have witnessed "The Aw Law".