i wish there was a term for this. When the guy is titty fucking her but straight in instead of at an angle.

Pixiv has the 縦パイズリ ("vertical paizuri" I think) tag, they are clearly more advanced in this area than us.

paizuri_penetration? (Unless we're okay with "penetrational" as a word.)

Wouldn't "horizontal paizuri" be more accurate?

Anyways, Kloah draws this kind of scene often in his works, if you enjoy this. There's a good Highschool Of The Dead doujin that came out recently.