What does purple grape, black fungus and soft banana mean?

Time is a butcher's knife, purple grapes, black fungus and soft bananas. Time is a whetstone, which smoothes the mountain peaks, withers cucumbers and destroys chrysanthemums. Experience is a mining factory, digging hills, damaging drill bits and blackening river ditches. Black fungus generally refers to girls who have been XXOO many times, purple grapes refer to nipples, and bananas refer to boys. I gave you Baidu.