Why are dead bodies tossed in the ground when they could be put to much better use?

Sure, there is organ donation, but over all, dead bodies of our fellow man are wasted and frivolously tossed into the ground, when they could be legally used for sexual pleasure, lowering the rape and other sex crimes (like pedophilia), used for scare crows, bones could be carved into fancy knife handles, collectible knickknacks, bowls, or other useful items, eliminating the need to make so much plastic, lowering our oil needs. These are just a few of the many things we could do with our deceased loved ones, but I won't bore you with more details. Why aren't we making this idea reality?