Anyone know if/how team totals are correlated?

Looking at bookies offering same game parlays.
And trying to decide how in head to head matchups should think about the correlation between the opposing teams totals?

Like would it be that if Team A goes over, their scoring denies Team B time and chances to score points, so Team B is more likely to go under?

Or maybe if Team A is scoring, Team B plays more aggressively, so is also likely to go over (increasing likelihood of both going over)? Same reasoning for a low scoring team promoting conservative play from opponent (increasing the likelihood of both going under)

I’m sure this is ultimately different depending on sport, basketball different from football different from rugby or soccer.

But anyone have general thoughts or know about a specific sport?