While a man is receiving oral, if the person doing the deed is a heavy breather through the nose and then scrapes the penis, that is called a Scratch n' Sniff.
The Scratch N Sniff is an alternative method of scratching your balls. This method requires you to cradle your balls in one hand, while you gently scratch your balls with the other. This method is one of many methods used to scratch a mans balls, one of which is the Pinch and Twist method.
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi