2) A girl who announces she's gay when being chatted up by a bloke she finds repellent.
3) The heterosexual emo females, who believe that gayness=coolness and therefore have all been gay/are currently gay/will be gay very soon but will embrace their genuine sexuality when that is in fashion.
2) Phil decided to go home after being shot down by the fifth convenient lesbian of the night.
3) Those emo girls aren't actually gay, you know. They're just convenient lesbians. Next week they'll be into pre-op transexuals to coincide with the latest reality tv show.