inb4 I aint sexist but I compare you to the stuff I sold, implying you want to sell yourself.
insert appropriate gif here
Hey you sell yourself too! Look at your signature line.

At least I have balls to admit it.

I sell the space below the
shit texts I write. You sell/sold hardware. Implying that a random female on the internet is a hooker does not result in you "having balls" but in you deserving to get your balls cut off.

WHOA WHOA WHOA, pump the brakes! Never called anyone a hooker, you said that!
All I said you want to be trustworthy here in Bitcointalk, prove it. Nothing sexist in that. Moving on.....
As far as posting a pic, it proves who she says she is(if it's a she), and validates the identity, building more trust than if he/she's an anonymous, potentially harmful scammer.