มองหาคำศัพท์ใดก็ได้ เช่น ratchet:
 
1.
To strike ones penis against anothers forehead resulting in an audible "thump". Often used to test the erection level of the penis.
Just before Luke put his penis in Megans mouth, he performed a density check to test that he had a full erection.
โดย Lexicon Lenny 03 เมษายน 2003