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HAHAHAHHAHAHAH No that would be a skid mark or a SH*T STAIN. go wipe your butt you nasty little person.
The reason you have brown stuff in your underwear is because you didn't clean yourself properly. Not wiping yourself can lead to an embarrassing stain on your underwear as a result of waste that was not cleaned up properly.
Brown Mark's birth name is Mark Brown.
Poo
Often black dyes will turn brown when exposed to bleaching products. The underwear was probably bleached. OR You pooped your pants too often
This could be the beginning of your first period.
how am i suppose to know I'm not perverted
Mark E. Brown was born in 1962.
Mark A. Brown was born on 1961-02-10.
Mark Brown - cricketer - was born in 1958.
It means you will start you period soon.
Mark Douglas Brown has written: 'Capone'