I go through phases and it's been a while since the last one but recently I've been indulging in a little anal play while masturbating so I thought I'd add my list to this thread.
cucumber
banana (with and without peel)
courgette
carrot
onion
tomato
boiled egg (shelled)
various wine bottle necks
various smaller bottle bodies
sandwich paste jar
shampoo bottle
small drinks can
hot dog sausages
bigger sausages
various handles (tools, hairbrushes, paintbrushes)
fingers (mine and wifes)
various dildos
inflatable dildo my wife used to like to over-inflate!
Tried my own cock a few times but I can only get as far as rubbing it against my sphincter
Probably loads of other things too that I've forgotten to mention.
They said I'd go blind but I'm managing just fine with the spectacles.
Happy to receive PM's from like-minded onanistas.