Answer:
Men in skirts blow into these.
I occur twice in eternity. And I'm always within sight.
What leaps one time out of four?
You do this into someone's ear when you want to be discreet.
There is a woman in a boat, on a lake, wearing a coat. If you want to know her name, it’s in the riddle I just wrote. What’s the woman’s name?
Within, I clean all that is bad and is old. I make juice that’s the color of gold. Should I die, a filter machine would you need assembled to replace me and beans I resemble.