Cock sucker
This is one of the more offensive curse that you can say to a straight guy, or any guy for that matter becasue its is usually said with alot of aggressiveness: "Cock sucker!!" .
But as it comes to sexual fetishes it is one of the more sexy things a girl can do for you while having sex.
women, on a subconscious level wants to feel submissive to a man. It is something that is built-in in a woman brain to find an Alpha male who will take care of her, and keep her safe so she could give birth and have children with him.
I think that this is the origin of it - The humiliating part of it. By sucking a mans dick a woman needs to "get down" on a man or bend her knee and he could look at her from above feeling like the Alpha male that he would like to feel even if his not and she could feel submissive to him.
