Luna somehow finds out Harry's...size... and she just looks at Virgo and is like "...you should probably 'exercise' more." It takes Virgo like a week to realize what she meant and her screams can be heard through the whole castle.

And then some time later she over hears the Gryffindor Chasers talking about how 'similar' Fred and George are physically. And Julia wonders if that means Harry and John are 'similar'. Virgo ends up blushing at the mental image