which gum to buy and tongue vs ordinary chewing?

[Thushespokeofit]

mastic vs falim? I was going to buy mastic cause its more natural but I heard it can be bad for the enamel[can someone confirm if that is bull or not I just heard it on reddit] also does it matter what brand?

also tongue vs regular chewing? whats the difference in muscle use?
and oh yeah open vs closed
mouth chewing?

 

[her]

https://looksmax.org/threads/mastic-gum-falim-gum.19921/