tuna mayo
No that is not a pregnancy symtom. Girls also get that when they are not pregnant. That white stuff that's coming out when you urinate is calles discharge. Its perfectly normal in girls. It doesn't mean your pregnant.
white stuff comes out
Semen.
The white flow experienced with girls is a normal vaginal discharge which cleans and moistens their private regions.
white stuff
It is banana milkshake
That's quite normal. It means your son has reached puberty. That white stuff is semen, which contains sperm. You shouldn't worry about it at all, even if it comes out quite often. Just tell him to let it out in private.
Sperm.
The seeds. Nothing to worry about :)
Yes
the white stuff that comes out of old or new piercings is a combination of dead cells and blood plasma. It is part of the healing process of the body.