Plot(from otp generator): 

You seeing frostbear and just having the most powerful, undeniable urge to have sex. Just out of the blue with no provocation except for frostbear's existence. Bonus  your conflicting feelings about acting upon the urge because they're in public.

Scenario 1:

" are you okay?"

Scenario 2: 

" what's wrong? do you feel sick?"

Scenario 3:

" um.. why are you blushing so much..?"