Recap i was in a hurry earlier so i said what just came to mind.

Anyway goku's a sweet person and very trusting by nature
but when you are being warn by a vampire to stop under estimating the possibilities i would think that he would take heed. Even through technically vampires are supposed to be non existent.

We know that that isn't the case any more hence hakkai and goyjo al through he is not a vampire but a shape shifter and then there's sanzo, Yet when sanzo tells goku their are possibly others out their waiting to make a move goku blows him off as if to say because he kicked sanzo's ass he can handle another which we know if sanzo hadn't of smelled goku's blood he'd be dead by now.

I'm just rambling but sometimes i want to strangle goku for his naiveness it's very stressing on the nerves because everyone that smiles in your face isn't your friend hence Zakuro spiking goku's drink or some one spiking his drink possibly another vampire perhaps.^__~