I like to urinate into bottles. I fantasise about keeping all my urine in bottles, putting stickers on them with the date and time they were produced, etc. But I am married and this is not possible. It is the same with my farts. I spend a lot of time thinking about how I could use some kind of tubing and a clear plastic bag to fart into. Then I could seal the bag and keep all of these as well. But I don’t think it would be a good idea to keep my own excretia. That would be disgusting.