Weiss would be extremely vulnerable to flirting from a gal, particularly a taller, stronger gal. She's used to guys coming onto her (and roundly dismissing them), but ladies not so much.

I had a thought that Weiss could be in the icyhot pool, spot Ling, and then just kind of pop out and clutch her for warmth, whilst apologizing profusely. And then maybe they find a spring that's actually hot, talk, flirt, mess around... whatcha think?