
the OBVIOUS answer is,
they engaged in coitus.
The Big Bang Theory Season 5, Episode 1

is it really necessary
to caption the OBVIOUS?
The Big Bang Theory Season 5, Episode 1

Really? Wow, I thought
it was so OBVIOUS, but okay.
The Big Bang Theory Season 11, Episode 9

I'm missing something OBVIOUS
you're about to point out?
Game of Thrones Season 3, Episode 4

And we're back to the OBVIOUS.
The Big Bang Theory Season 5, Episode 1