Tiff always enjoys getting comfy and close to friends for a cozy night in. Her friend Silver can certainly attest to that. Being non-newtonian certainly helps them slip in more easily, but it's still a bit of a stretch!
I'm sure Tiff will enjoy the extra girth and ballast for a little while, in any case.
I start to like your cocks pretty much!
You have a way of drawing them that shows their weight so nice!