A snake

You look down and see a snake crawling up your leg. You are frozen in fear, worried that it is venomous and that if you move it will bite you leaving you poisoned with no chance of help.

It continues up your leg until its face reaches your panties which it slowly nuzzles its face inside. You gasp as its feather like tongue brushes for an instant against your clit, then again as it continues to do so. As you lie there you feel your pussy begin to moisten as this snake continues to perform what you can only describe as cunnilingus on you.

The adrenaline from the fear caused by having a possibly venomous snake with its face in your cooch combines with the sexual excitement of said snakes oral ministrations to drive you ever closer to climax. You try top stay still but it is becoming more and more difficult not to start writhing in pleasure. You are unsure what will happen when you reach orgasm but you can feel you are about to find out.