To give a Christmas bonus, a girl must have sex with a guy in the cowgirl position. Then she gets off right before he orgasms, knees him in the balls, says 'Merry Christmas' and walks away.
Shelly gave John a Christmas bonus last night and he couldn't get out of the fetal position for ten minutes.
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