Is it healthy to go to Lift weights everyday or work the same muscle everyday?

My friend and I were havinging a massive debate about this I kept on telling him you can go to the gyn everyday or work the same muscle everyday... He keeps doing 30 reps on everything I'm like DUDE YOU CAN"T BUILD MUSCLE LIKE THAT!!! I told him to select a weight that he can do at least 5-8 reps with N he said I sound stupid for saying that WTF? I Felt like Slapping him

Yea it's perfectly Harmless :)
NO!!! are you retarded? You'd start destroying your muscles
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Is it healthy to go to Lift weights everyday or work the same muscle everyday?
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