Toilets have seats so that you can sit comfortably on the toilet without falling in.
When you close the lid on a toilet seat it also works as a place to sit while you do your makeup, put your socks etc after a shower.
Without a toilet seat you would fall into the toilet so a toilet seat is required.
One piece toilets are better than two piece toilets as there is no place for the water to possibly leak out.
With a one piece toilet the tank is completely sealed to the toilet without any need for gaskets or bolts where it could leak.
One piece toilets are more durable and longer lasting than two piece toilets.
Public toilets have a gap in the seat to allow for easier cleaning of the vagina and butt after peeing or pooping.
The reason public toilet seats are open in the front is to make it easier for people to clean up after themselves.
With the open toilet seat at the front you can reach under and through the toilet seat to wipe your butt.
The open toilet seat also allows women to wipe their vagina or perineal area without contacting the toilet seat.
You should shut the toilet lid when flushing the toilet as flushing the toilet sends bacteria into the air.
When you just pee it's not always necessary to flush the toilet with the lid closed as not as many germs will float around.
But with poop germs can float around but it's not really a problem if you do flush the toilet without closing the lid.
You should flush the toilet every time you pee, especially if you live with other people.
If you live alone then it's not always necessary to flush the toilet just when you pee and you can wait until after a few more pees or wait until you poop to flush the toilet.
However for me I always flush the toilet when I pee as I just don't like leaving anything in the toilet.
I was always disgusted when I lived at home with my parents and they would leave the pee in the toilet.
I would always flush it regardless as the pee eventually started to stink.
Pee is pretty sterile but as it sits out in the air after it leaves your body the pee starts turning to ammonia and can begin stinking.
If you live with others then it's best to flush the pee down the toilet.
Flushing a toilet uses at most 1 gallon or slightly over 1 gallon of water per flush.
If you need to conserve water then yes you should avoid flushing the toilet every time you pee but otherwise you should go ahead and flush the toilet.
My water bill has a minimum use of 2,000 gallons anyway so even if I don't use the 2,000 gallons of water a month then I still pay for it.