I was looking through a book that's full of illustrations. These pages gave me some inspiration as to what topic that can be embarrassing which motivated me to research into the areas. 

Mythmaking by Anja Nolte

Masturbation can be a very sensitive and private matter.  

Gorilla Dentada By Maria Steriki

The exposure of private part of the body.

Cloud Cuckoo Studio By Claudia Boldt

The images above and below reminds me of the uncontrollable changes of the body affected by emotion/environmental factors for example.

50Bucks:Bring on the Sluts By Srah Beetson

Letters for Masha By Evgenity Tonkonogy

Hairy body can be embarrassing for women especially but also for man sometimes.

Letters for Masha By Evgenity Tonkonogy