Whats the trigger if I want an object that makes either player lose when they touch the object with any bodypart?

You have to set the action (ie. uke wins/tori wins) on the body parts, not the object.
Then you just set them up like normal triggers.

There's no trigger function that causes both players to lose/win.

The trigger system is a little bit limited in this sense.

yes but the object must be a trigger also otherwise the object would not do anything,it takes two two more triggers for an action,its like a gun,you can have a trigger,but u need a finger to pull it