A blast from the past - A blast from the past is when you give your grandpa a blow j

A blast from the past is when you give your grandpa a blow job and he goes full grandpa mode.

I gave my grandpa a blow job and he went full grandpa mode.

I gave my dad's dad a blow job and he went full grandpa mode.

I gave my old man's dad a blow job and he went full grandpa mode.