Within an hour he would be able to taste her blood.
How big the world got when you could taste blood.
He could taste blood from a cut near his mouth.
He could taste blood in the back of his mouth.
Of course, she shouldn't have let him go so long without having tasted her blood, either.
What might taste his blood in the water, and seek its source?
He could taste blood at the back of his throat.
A foot kicked him hard on the side of his head, and he could taste blood.
"And once you taste blood, you're not going to give up."
Telling him I could taste other people's blood in his mouth was not going to be helpful.
Idiome