I can't imagine that working until you've already built up a lot of attraction between both of them. Unless they are dying to fuck you, you're basically gonna be told off.

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"The 'Brick Walls' are there to allow you to prove how badly you want something!" ~ Randy Pausch

~ Rye

Ok so you then calibrate.

HB: Take off your shirt
PUA: You wish, you beast!! I tell you what ill do it if you buy me a drink, i might aswell get a little drink in me before you ravage me.

Basically neg her for conveying alot of intrest in you aswell as throwing a bigger loop out (how big that loop is depends on what you think you can get away with)

HB: Take off your shirt!
PUA: Hey im not some sort of porn star for you to perv on, your creepy!

HB: Take off your shirt!
PUA: Take off yours...
HB: NO way its not the same.
PUA: Why not? [making her jump in]
HB: Because i have tits! You dont..
PUA: I work out, i have man tits! My nipples are spectacles of excellence. Only the worthy earn a right to manipulate them.

hahahahaha love it.

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Ratio theroy...

Just do some neg to make it a privlege to see your "great" bod. Some shit like, " Hey now, this shit isn't for free. I work at it, and so do the girls who wanna see it". With a big ass smile on your face to counter the huge masses of conceded prick your emanating. Be sure, when talking about girls working hard to show a little ab.