(Aliens used my account for another probing experiments)
Buy 7 balls of different sizes, the last one a little too big for your hole,
the first not smaller than 1 inch (2.54 cm).
Put them into a big condom or long balloon, smallest first and biggest last,
you can make a knot between each if you worry they will change place.
Lube up and probe, and obviously the last one will not fit, so it will
be left outside.
Then go about your daily activities...