Hi HJ,
I think the question you ask is a very good one. Why do we take the bar girls/L boys that we do? They ask us lots of questions, and we look at them and think they are beautiful, so we 'hire' them!
BUT, after a while, you look for a little bit more, so, as you say, you interview them.
I look for honesty (Is it possible!!!!

).
Example:- One ladyboy I came across at 2.30 am said hello to me.
I didnt say hello back, I just asked 'Have you had the operation or not?'
They said they had not had the operation.
I then asked how much did they want for 1 night.
They said '500 baht'.
I said 'ok lets go'.
Normally you hear bullshit stories, and when you ask a price you normally hear 2,000 baht.
The ladyboy I talk about, they have stayed with me for many weeks now. If they had lied I would have told them to leave.
Same with bar girls. First I always ask ' how many children do you have?) then I say ' Where u from ?'. A lot of times they say Isaan, and I say 'NO, you are from Laos!!!
If I want to take a photo, I always tell them that I will take a photo and give them the original.then let her have the shit copies of boring photos.
Take care.
DM