He arrived in the Philippines from Sydney on August 19 to meet a minor he met through Facebook.
Facebook personnel flagged authorities when they discovered numerous naked photos of a 13-year old girl posted in chat sessions with the suspect, known as "Nick Mrison" on the social networking site.
Lots of people masturbate and this is a natural way of exploring and getting to know your body and discovering what kind of things make you feel good.
For more advice about masturbation and periods you may want to look at the Girls puberty page in Explore.
As youve never had sex or any sexual contact with a boy, it would be impossible for you to be pregnant. There could be lots of reasons your period is late.