Answer:
Who has married hundreds but always been single?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
I have joy in bringing two together, but darning my existence! My life hangs by a thread, filled with ups, downs and resistance!
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?