boy and gal ...status?

Was discussing wid some friends and my baby
why somethings boys can do but girls cant do?


For eg:
When a guy smoke..
is just a normal case for every1 right?
but why when girls smoke..
most ppl will or might say "bitch"
why?

or take another eg:
When guys go clubbing and dance wid another girl
touching various part of their body..
no1 will think that they are cheap or something
HOWEVER
when girls go clubbing and dance with another guy
get touched everywhere
most ppl will say she is a cheap bitch right?
WHY?

And while we discussing
a funny thing come out again

a girl who have sex b4 or get nail many many time
by diff boy...
most ppl will look down and despise her
BUT why when guys do sex a lot time
and nail many many girls
they are known as cool?

something is wrg
girls are actually doing the same things
as the boys do
but why MOST ppl thinking will be more negative
on girls side?

why why why?
haha