WATCH: Joe Biden's Senior Moment of the Week Vol. 20

'He's got some real biceps. We call them guns.'

Welcome to the 20th installment of our weekly series on President Joe Biden's senior moments. It's an especially notable milestone because Biden is on the verge of making history. On Sunday, he will become America's first octogenarian president. We don't think he looks a day older than 79.

This week our bumbling commander in chief mistook Cambodia for Colombia during a meeting with Asian leaders, temporarily forgot how to read, and went lusting after a Russian man's large biceps. (Collusion? Maybe.) "His biceps are as big as my calf," Biden swooned. "There's a man ... He's got some real biceps. We call them guns."

Happy Birthday, Sleepy Joe! Have a great weekend!

BIDEN SENIOR MOMENT ARCHIVES:

WATCH: Biden's Senior Moment of the Week Vol. 1

WATCH: Biden's Senior Moment of the Week Vol. 2

WATCH: Biden's Senior Moment of the Week Vol. 3

WATCH: Biden's Senior Moment of the Week Vol. 4

WATCH: Biden's Senior Moment of the Week Vol. 5

WATCH: Biden's Senior Moment of the Week Vol. 6

WATCH: Biden's Senior Moment of the Week Vol. 7

WATCH: Biden's Senior Moment of the Week Vol. 8

WATCH: Biden's Senior Moment of the Week Vol. 9

WATCH: Biden's Senior Moment of the Week Vol. 10