Sokka is not a virgin, ladies and gents. Not after the episode from Book Three where Zuko walks into Sokka's tent to see him awaiting Suki in a rather, mature
environment, for lack of better words:
Shortly after this scene, we see Sokka squatting behind a rock, holding a flower lei in his hand for no apparent reason, one that he had not previously been shown to have:
This is a subtle and clever pun, indicating that Sokka got "lei'd" and Suki was deflowered.
This man is quite the player, you see. He dated and kissed the MOON, whose name, Yuè (a Chinese word) can be translated to "moon" when written as "月 球."
And then he scores with Suki, one of the most badass characters in the show, whose name roughly translates from Japanese to "love," "Opportunity," or "fondness."