He's holding the phone to his left ear.
Ears do not CROSS hemispheres.
The Big Bang Theory Season 2, Episode 15
In the summer, it's in a CROSS breeze created
by opening windows there and there.
The Big Bang Theory Season 1, Episode 1
Who gave you permission to CROSS the
siege line and enter the castle?
Game of Thrones Season 6, Episode 8
Lf you CROSS the sea
with an army you bought...
Game of Thrones Season 2, Episode 5
We have to CROSS here.
Game of Thrones Season 6, Episode 1