oh God;no I dont need to be anymore paranoid lol
but thanks for the help
Some activities are more risky than others. You will come across several cases where people have been having intercourse with each other for several years, and have not transmitted Hep B to each other. Nothing about Hep B is written in stone, but the three activities you mentioned have decreasing rates of transmission. 3 is something I do without a second thought with my friends.
If you want to be borderline-paranoid read this: www.immunize.org/catg.d/p2100nrs.pdf