Dow.com: "They're also thermoplastic materials that are readily calendared, extruded, injection molded, or cast".
Polyethylene is what flexible water pipe is made of. Not terribly soluble. Of course microplastics suspend in water, but I wouldn't go putting it in (either end) of my body.
Just a quibble but I wouldn't confuse polyethylene and polyethylene oxide. Consider carbon (coal) vs carbon dioxide (what you exhale).
Make a separate thread about lubes, it deserves one. I wouldn't recommend fucking strays. First and foremost for me, it's not what this this forum represents, nor Zoophilia. Second, the risk of disease, in your country especially, is quite high. Third, Your obvious inexperience with even the basic anatomy of dogs raises the risk of injury to yourself and them to a level I don't even want to think about.
My final thought though is that we here are simply being baited with this post anyway. The English goes from broken to clear back to broken back to clear way too easily...
sw
I've taken in strays. To be honest, if a dog comes to visit me, I consider them fair game, but generally only if I'm in a position to feed and care for them. I have and will put up 'found' posters, check their tags to see if there's a number or have them searched for a microchip.
Strays coming to me and responding with wags to my attention tell me they like me, generally.
and hard to ignore the excited happy dance
this could be a helpful thread for many others with the same questions....even though this is probably a baited thread...