You're probably just absorbing the tadpole's life essence or something, there's no way you're going to stick 15 tadpoles in your brain, it makes no sense thematically, logically or physically xD
Didn't we see an animation of a tadpole literally burrowing into your brain during the last showcase thing? I'm not 100% sure anymore and I'm trying to avoid spoilers at this point, but I think we saw that.
Personally I'm going to play as an unhinged goo warlock and embrace the cutesite.
