butter is an excellent lubricant
for your RECTAL exam.
The Big Bang Theory Season 5, Episode 17
and give away free RECTAL exams.
The Big Bang Theory Season 7, Episode 3
...before the FDA finds out
they may cause RECTAL bleeding.
The Big Bang Theory Season 8, Episode 1
that'll show you how
to perform your own RECTAL exam.
The Big Bang Theory Season 5, Episode 17