Boy guinea pigs don't have nipples.
Yes they do my two girls are both 23weeks and they have nipples :)
Girls have nipples from the time they are born, perods have nothing to do with them.
The same difference between boys and girls everywhere.
Yes you can some girls like there nipples sucked on some don't you can
The difference between them is a girls basketball is not as heavy as a boys basketball!
there is no difference
of corse
The nipples get larger so as to better suckle the baby.
Yes hairy nipples are normal for Men... but for girls they usually dont grow hair around the nipples.
Yes
Your erect nipples obviously attracts girls, that's why.
the pervs of the world find woman nipples sexual but not men.