Truckmasters,
It is your choice. If you do choose to have the vaccinations, bear in mind that Hepatitis B is rampant in East Asia and South-East Asia. There are literally millions of Hepatitis B carriers in the polulation, and it is completely preventable by the vaccination. If acquired, it is completely uncurable, and carries a very significant mortality rate.
Sex is only one of many means of acquiring Hep B, there are numerous other ways to acquire this fatal disease. You don't have to be a 'bad' boy or a 'bad' girl to get Hep B.
Regards,
Old Smokey