Come' on, human are borned because they are sinful lah, if not y
babies cry when they are born? Make sense?
like what you say you 'mari kita', nothing unusual every man
will.
it's not sinful, if you really by 'mari kita' you are sinful, sorry
to say this but it's fact, go *scissors* it,
it's normal, buddha doesn't blamed you for this unless u are a monk
alright.
if it's sinful then everyone of us is full of sins cause of
sex!
don;t be too bothered about it.
Cheers 
