Kinda embaressing question!! pease answer! best answer 10 points?

ok this may sound wierd but i dont know! its never happened to me before but all my friends are so comfortable and stuff! lets say yo ur at your friends house and your sleeping ove rnad you really have to use the beathroom number 2! you cant just wsay hey my stomach hurts and stuff. sure theyll understand but ull get embaressed! also, you might stink up the bathroom! what would you do in that situation? also, lets say ur at skool or something and u hav a booger in yur nose and u kinda no ur frends see it and its embaressing and there is no tissue near by! what would u do for both situation??????/