Yes. Since their relationship
became CARNAL...
The Big Bang Theory Season 3, Episode 4
...in a very intimate
and CARNAL fashion.
The Big Bang Theory Season 2, Episode 23
That's not to say that
if a CARNAL relationship were to develop...
The Big Bang Theory Season 1, Episode 1
The CARNAL repartee, the erotic to and fro.
The Big Bang Theory Season 2, Episode 12
Obviously another CARNAL fiasco
with the "shiksi" goddess.
The Big Bang Theory Season 3, Episode 2