Write an erotic story with 3 characters: NAME_1 NAME_2 (female and male in a relationship) and their friend, NAME_3 (a single male). They are sitting in a table at a bar and NAME_4 dressing seductively tells NAME_3 that she has decided to tease and deny him until he finds a girlfriend. She will keep his cock and nipples hard all the time and the only way for NAME_3 to stop this is by flirting with a girl in a bar and joining the other girl's table (and hopefully fucking her brains out later desperate like he is, if things go well). First he thinks she's joking but soon she starts teasing him secretly under the table with her legs and eventually starts stroking his cock and nipples through his clothes. NAME_3 grows ever more desperate. No one at the table knows what is going on and NAME_4 continues acting completely normal.