[harmful_stereo]

Kissing the wrong person could be a gateway to depression. I wonder how long it might be before one could sue for damage to their microbiome.

[rlucas]

By that logic -- kissing a depressed person could just as well be a cure for their depression. Cheer up! (Pucker up?)

[cheeko1234]

Wow, didn't think of that. I wonder if that's a possibility.

As a clueless person, I'd think the quantity and stomach acids would make it a negligible risk but worth studying.