Nintendo Switch 2 cartridges are designed to be spit out
Briefly

Nintendo applies denatonium benzoate, a non-toxic bitterant, to Switch cartridges to discourage ingestion, particularly in children. This precaution stems from understanding that kids tend to explore by putting objects in their mouths. Nintendo's technical director, Takuhiro Dohta, mentioned that the design aims to encourage spitting out the cartridge if it enters the mouth. As the Switch 2 approaches its release, the taste remains untested by most, with Dohta humorously reflecting on his own brief experience licking a cartridge during development.
Nintendo has applied a bitterant to its Switch cartridges, aimed at preventing accidental ingestion, especially among children who explore the world by putting things in their mouths.
Takuhiro Dohta confirmed that the design of the Switch cartridges ensures that if they enter your mouth, you'll spit them out, discouraging any attempt to taste them.
Read at Polygon
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