What Am I Riddles

Question: When you fall in me your as happy as could be, but you fall into depression when you lose me.

What am I?

Question: What gets longer when pulled,fits between breasts, slides neatly into a hole,has choked people when used improperly,and works best when jerked?

Question: You put me in dry but then I get wet.
The longer I stay in, the stronger it will get.

What am I?

Question: What type of cheese is made backwards?

Question: What do you use to hoe a row, slay a foe, and wring with woe?