If you freeze some yogurt in something like the finger of a glove or in a tampon-insert-tube-thing, it makes it easier to put in *and* the coolness eases the BURNS LIKE FIRE.

But at the same time (speaking as someone who's made homemade yoghurt ever since she was old enough to hold a spoon and not drop it's contents) that kills the bacteria (the good stuff that fights the yeasties). L. acidophilus is actually happiest at about 117 degrees Fahrenheit.