if you can provide some proof, citations from the Qur'an or any valid hadiths then I'll believe you..but if a guy and girl are within their limits, not alone, and they are talking..there is nothing wrong. You are talking to girls on this forum too. You can't avoid talking to someone of the opposite sex, especially if you are in school, working, out shopping, etc. You are bound to communicate with someone of the opposite gender. It's not gunnah. If a guy and girl have pure intentions, there is no harm. As I said, desis put too much emphasis on culture and what society thinks. Please Allah (SWT) that's all that matters, noone else :) Also During our Prophet Mohammad (SAW) time, gatherings weren't segregated. If I am wrong about anything I've said, please feel free to correct me. Thanks!