Quote Originally Posted by jim
...how to introduce a sub to these devices and which type / size you would recommend also interested in knowing how to develop this to a full day session ...
Buy a set of graded sizes from tiny to fairly big, but don't buy one that is more than two inches diameter at first. Lube the "head" of the smallest one well using KY jelly or similar water-based lube; if you buy a silicone plug, don't use silicone lube. Rubber/latex plugs are OK with silicone lube. Put the plug in her anus gently, but make sure it is right in up to the base flange or it will pop out as she moves about. At first, keep it in her until she doesn't want it in anymore, or until you need to remove it for a toilet visit or to fuck her anus.

Try to extend the inserted duration a little bit every time you use the plug. Once she's happy with this regime, go up a size. More getting used to it, extending the wearing period... then up a size again, etc.

In my experience, the breakthrough will be when she can sleep a full night with it in. From there it is a short step to keeping it in for days, removing it (only temporarily) to fuck her anus or clean it while she uses the toilet, you apply an enema, etc.

You will have to develop your own plan for how frequently you re-apply the lube. Some wearers find that a minimum of lube is good for keeping it in while walking, etc, during the daytime, to stop it from slipping out too easily. Others find that lots of lube is necessary for long-term wear to avoid chafing. This is where experimentation with lubes will help, as the ones that are good for easy insertion or anal sex are not necessarily best for long-term wearing. Acrylic, Pyrex or metal plugs, while utterly rigid, allow freedom to use any lube you want, including oil-based ones if she prefers.