Post pictures of you trapping your balls in a book while trying to get your hand up your asshole or possibly a dildo or fallic object.
Get five objects of increasing size, and one extra object which only just fits in your ass. Insert the first, smallest object, tie an elastic band around your balls and edge. insert the other four objects one after the other in size order, adding an additional elastic band each time and edging. On the fifth object ruin your orgasm. Use the cum to lube the extra object and insert that, then cum for real.