Is it normal to throw stuff into a bottle and leave them there to rot?

This shit started when I had a bottle of water in my room, it was opened for a week or 2, it was half empty. My boyfriend came to my room, wanted to drink, he smelled the bottle and almost threw up, then asked me how old that shit is. First I was going to throw it away but then I said Im going to leave it there to rot and smell it a month later. He liked it and came with the idea to throw there some food, cum, blood etc. So last time we fucked, I emptied out the condom into the bottle, shaked it well, then we smoked some weed and threw the ashes into it. I also threw some small pieces of bread there. We are going to add other disgusting stuff there and see how stinky it can get and maybe leave it somewhere to people we hate.