>>17648612
So, you're saying Yamame doesn't infect humans as a rule, and only considers the option as "punishment" for Marisa. And she doesn't even deliver on the threat.
This, combined with her profile, as well as Akyuu's own admission that Yamame is actually somewhat friendly, just confirms Yamam's Yamams are, in fact, the friendliest boobs in Gensokyo.