I once made a toy that was perfect for that job. First buy or steal a 3 inch piece of swimming pool noodle. Your neighbor probably won't notice his is a wee bit shorter. Practice squeezing it down to the smallest diameter possible and see if it is small enough to fit into the gape you already have. ...

I'm not sure if I belong here, so I'll just spill my guts and let you be the judge. I have been anal erotic since I was 5 y.o. and let a toilet plunger handle make love to me ;-) BEWARE: I tend to use the "crude" words that stir our spirits - Fuck, Cunt, Cock, Cum, and for some reason, Sperm and Shi...