It’s important – in fact often essential – to use a good quality water based lubricant with just about any sex toy, but especially with pocket pussies and realistic vaginas, or indeed any product that requires you to insert your cock and apply friction. Lubes reduce friction, making sex toys slippery and much more comfortable to play with.
The reason why lubes are often needed is because many sex toys are made of porous rubber (or other materials) that soak up your body’s natural lubricants. Artificial lubricants can help with vaginal penetration, but a thick oil based lube is important for anal play. Unlike a pussy, the ass has no natural lubrication of its own and the delicate lining can easily be torn with friction.