Shave if you like.  I'm the only guy I know who shaves his legs.  The tights really do stay up better and they don't pull if you shave; it's quite a good feeling.  But it's not a big enough deal to go one way or the other on.

>2. You know that string inside ballet slippers that make it tighter on your foot when you pull on it? When you tie the string, do you tuck the bow under the flap our your slipper or do you wear it out?

Definitely, tuck it in!

Happy dancing!