When you’re anxious ants go here, when your dog is exhausted it does this.

One: You gotta hit me on the head, literally and figuratively, for me to be effective. Two: Bite me to appear nervous or paint me to appear well put together. Three: Use me as a colloquial way to celebrate an achievement.

sweet as can be, you'll have to undress me

A behavior you are better not adopting. Added to president and, perhaps apocryphally, it is not worth a warm bucket of spit. Change the first letter to n and it is praise for a riddle well written.

Skeletons loves to play this instrument of medoldy and class