Tasty Mystery Baskets of Clips

- Well, yeah. - I'm a theoretical physicist.
Oh, he once spent nine months with my legs wrapped around his head.
If you're not attracted, then the likelihood of conception will be reduced.
- Howard-- - I know, I'm disgusting.
...from bosonic string theory to heterotic string theory.
...that the second-grade curriculum had rendered you quizzical.
Now, I've lived my whole life dealing with the fact that my twin brother is...
- Hi. - Wow, you don't look that much alike.
Wait a minute, Leonard made you aware of that?
...for homemade integrated circuits.
- Pretty much, why? - Just catching up.
So how do you two know each other?
Excuse me, this is my apartment, and she's my roommate's sister.
Neither of you are good enough for my sister.
They are no more alike than any other siblings.
Hey, Leonard, you left your underwear in the drier downstairs.
She's my twin sister.
...and that I'm having regular bowel movements.
But since then, we've pretty much gone our own separate ways.