Tongue twisters. All levels

Start twisting ☺
Three thin thieves thought a thousand thoughts. Now if three thin thieves thought a thousand thoughts, how many thoughts did each thief think?

This thin thing.
This thing and that thing are better than those things .
The thin thief went through that thicket over there.
Theodore sees a door and she adores Theodore.

I sank you and you thanked me.
I sank you and you thanked me; I think I'll sink you again.
I thought I shot a dot.
I thought I sought a shot of something super strong, but what I think I thought, and what I should have thought are surely not things that I like to think about for very long

I saw Susie.
I saw Susie sitting in a shoe shine shop.
Where she sits she shines, and where she shines she sits.

How many boards…?
How many boards
Could the Mongols hoard
If the Mongol hordes got bored?

Mary Mac.
Mary Mac's mother's making Mary Mac marry me.
My mother's making me marry Mary Mac.
Will I always be so Merry when Mary's taking care of me?
Will I always be so merry when I marry Mary Mac?

When a doctor..
When a doctor doctors a doctor,
does the doctor doing the doctoring
doctor as the doctor being doctored wants to be doctored or
does the doctor doing the doctoring doctor as he wants to doctor?