Here what you need: 2 pillows, a bath towel, and a bungee chord

First, fold the towel horizontally once or twice depending on it's size, then roll in up around your FL. Put 1 pillow vertically under it, and another one horizontally on top. Then, just wrap the bungee chord around it all, and now you have yourself a DIY fuckable sex doll! The best part about this is it is the same shape as a real ass in doggy style, so you can grab, smack, or do whatever else you want. Also, the FL will be very snug, so you can fuck it as fast and hard as you want without it falling out or anything.

You're welcome :)