It sounds like it could be a species of assassin bug
Hummingbird Moth
mantid flies
The fire ant is a common native of tropical climates in the southern United States. Variations of the species have a black body with six orange legs.
Milkweed bug
the bugs are called box elder bugs you cannot totally get rid of them unless you get rid of the box elder tree or trees, but you can control them by spraying them with soap and water.
it means you stink like crap
It may be the larva stage of a Coccinelidae (ladybug).
The plural of the fly, the insect, is flies
An insect that can have a black body and yellow tail, flies, and stings may be a hornet. Many species of wasps and hornets match this description.
They are insects.
No insect has teeth.
This is most likely a crane fly. They resemble a wasp. Crane flies do not sting or bite and pose no harm to humans.