They produce saliva that makes our bodies go “ew bro what is that”. Our bodies then deploy the pew pews to destroy the sus liquid, but their aim is worse than trying to pee into a toilet with a full erection. So when they big sippin on your blood it’s not the “yeah bro just take a waterfall” type consideration, they be like “nah I’m gonna backwash while I consume your means of production”.

And when you scratch at the succulent nectar they have bestowed upon you, you’re just lubbing it up for when daddy comes back for seconds. Which translates to “suffer”.