Perhaps it's out there and I haven't found it but it'd be really fun to have a butt plug that could be left in and perhaps raise lust but would satiate the buttslut need for cum and thus stop excessive/unwanted ass expansion. Perhaps the same one or a different one could satiate Fuck Fever. Currently I use a male butt bug to keep those things in check and the goo armor charged but...yeah, just a fun idea.