Don't blame you for that. Everyone comes from a different social setting with different
norms, values etc. Its all cool though, there are many WGs above the 18 year old mark
that are out there.
Basically, if you're not comfortable with a certain age, be it due to different cultural
norms or whatever, move on to the next category and you will surely find one you fancy.
No point in paying for a punt if at the start, you're not comfortable with it...chances are that
you wouldn't feel any better (may be even worse) after the session as well.