According to Taiwan Province media reports, according to foreign research, Scarlett Johansson, the "black widow", is considered to have "the most beautiful lips on the surface", which makes people want to kiss most.

in his article published in the journal Cranio-Maxillo-Facial Surgery, Dr. Paul Heidekrueger pointed out that it is ideal for a woman to have a similar upper lip and lower lip thickness. Emma Watson's upper lip is considered too thin and looks less attractive. In addition, Rosie Huntington-Whiteley, a supermodel, is comparable to Scarlett.

The study recruited 56 plastic surgeons and 56 ordinary people from 35 countries, and asked these subjects to look at photos and choose the lips that attracted them most. The results show that the thickness of upper lip and lower lip is 1: 1, which is the most popular. If you can't reach this ratio, the lower lip is slightly richer, which is the attractive condition for the second place.