Hot girl in a short, sexy red dress stops men passing by and says hello. The men are total strangers and don't recognise this beautiful woman, but they're quite pleased by the attention. The men are so mesmerized by her that they are no longer aware of their surroundings - they turn around and immediately run into an old ladies' tea party, knocking over the entire table and smashing all the china teacups.
It's not that their brain turns off cause they see a pretty woman. It's that they can't figure out why she's paying attention to them. We men are such easy targets when a pretty woman is involved. Looking at this gag, I am laughing but at the same time, I realise how predictable we are...