I've been working in the commercial facilities and construction industry for 20 years now. The number one item that clogs the toilets is tampons. Yes, the box does state they are flushable, but that just means they are septic treatment friendly (ie; breakdown at about the same rate as toilet paper), that does not mean they don't get snagged and hung up in the pipes (as they do) As for hair.... the waste pipe connected to your toilet (assuming your dwelling is close to code) is either 3" or 4", you would need to shave your head completely, drain the water out of the bowl completely, fill bowl w/your hair, then flush to even come close to clogging that pipe w/your hair.