EVERY ONE WHO SEES THIS if you get the fun fact about an apple and a potato and a onion tasting the same im a scientist so i study the human body. your answer to it is Although taste is perceived by the tongue, nose also helps appreciate it better. That is why, when you have a cold you feel food is tasteless. But no!! apple, potato and onion will not taste the same. Tongue perceives the texture, taste buds perceive tastes like sweetness, saltiness, sourness and bitterness. Nose helps perceive the flavour, which alone cannot be understood when nose is plugged.