An omnibus question thread from a straight guy

Had a few few questions that I've been meaning to ask so I'll sum them all up in one thread to keep from spamming the board.

How often/have-you-ever-personally-known bisexual girls that "disappear" into lesbian relationships?

What do you think of women that identify as lesbians that are actually bisexual?

Is it just me, or do bisexual women hold men to a different set of standards than they hold other women?

I wouldn't normally ask but the questions are quasi-relevant to current and past situations I've been in.

edit: and before I start getting accusations of this being a "straight guy looking for an excuse to hit on lesbians/trying to get them to change sides/bragging about getting them to change sides" no that is not my intention.