Tasty Mystery Baskets of Clips

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