Hollyoaks:

Man "Ive got pubic lice, and ive only had sex with you recently"
Woman"are you trying to say ive been sleeping around?"
man"welli havnt sleept with anyone else, so you must have been"
Woman "oh I shouldave known"
Man "Well I shouldave known you were a cheap tart"
*cue the best comeback ever*
Woman "well at least my brother wasnt a mass murdering rapist"

[exeunt]