A willing meal(Vore)

[Context: this is set in a world where big animals swallow things whole, and only digest dead things, and choking is impossible]

You stand at the edge of the river, waiting patiently, like a predator waiting for prey. Only this time, you were a prey waiting for a predator.
You dangle your bare feet into the water, which had several tall-ish, flat-surfaced rocks on it.
Climbing onto one, you shrug off your trench coat and look at the water, for any telltale ripples.
A big splash is not what you were expecting.
A massive hippo splashes out of the water, and attempts to climb up the rock you are sitting on.
'Hey there buddy, be patient, you'll get your meal soon enough.' You say, taking off the rest of your clothes and jumping onto one of the lower rocks. You pat both sides of the hippo's jaw, and it opens impossibly wide, you sit down and dangle your feet just above the beast's mouth, and slowly lower yourself in.
Your feet lie in the beast's throat now, and you let go completely, allowing the beast to slowly pull you into it's massive maw.
'That's it buddy, get me all the way in there.'
Only your head is in the open now, and one final swallow from the hippo sends you hurtling down into it's massive belly.
You settle down comfortably in the beast's stomach, and slowly drift off to sleep.

Chapter Two:
You awake on the edge of another jungle, naked and alone. You look up into the trees to try and find another predator. And a slight rustle in the tree shows you what you were looking for.
A snake.
You walk over to the tree, and start to pick up debris off the ground, and aim them at the snake. One hits it square in the face, causing it to slither down the tree and look at you. It suddenly darts towards you, and you lie down, dodging the attack. The snake makes it's way towards your feet, opening