Tbh I am still a bit scared of putting any 'foreign' devices up there and have not explored out of my comfort level ( 3-4 fingers usually dependent on the size of my morning dump and stress based elasticity)
Stayfade - I'm assuming this technique is challenging for you based on the girth of your cheecks? Like maybe you can grow your nails out for a year or two and form a cone shape with a thumb, index, middle combo?
Only foreign if you haven't been introduced first ? Hello Mr Bed side lamp, hello Mrs bottle of detergent etc?