Imagine going on a blind date and it goes so swimmingly, you invite your date home. Except you don't even make it back to your car before things start getting hot and heavy.
But he starts acting a bit funny. You don't think too much of it until he kisses you firmly closed lips on your neck. Then he bites you so hard you not only come, you pass out.
When you wake up, there is a giant shark man standing over you saying he was your date and that he's abducted you to be his mate. He insists you're totally safe and there is nothing to worry about, things will go at your pace.
Jokes on him though. This is your dream come true.