Ok what does pm and pvt mean?

I may seem a bit out of touch but what does pm and pvt mean when it appears in members ads - as in don't pm or don't pvt me!
I ask this as I've lost one contact - must have got fed up with me as I messed around and crashed my pc one night! I logged back on and apologised but that was it - never heard from again! So I want to get it right and not piss people off from the start.
Also, I told one contact that I liked her new pics and would be voting in the Am I Hot section - how do you get directly to the person you want to vote for? I seem to have to trawl thro hundreds of pics and never get to the right person.

BB