You can't ruin a FRIENDSHIP
with sex.
The Big Bang Theory Season 5, Episode 1
as Schrodinger's Friendship.
The Big Bang Theory Season 5, Episode 5
...that FRIENDSHIP requires
a certain give and take.
The Big Bang Theory Season 4, Episode 23
So much for our FRIENDSHIP with Sheldon.
The Big Bang Theory Season 3, Episode 1
Clause 209 suspends
our FRIENDSHIP,
The Big Bang Theory Season 5, Episode 15