If there's no expressed and mutually agreed upon commitment then there's no relationship and anything is fair game. Keep that in mind...

As for the natrual progression of things....personally I don't go down first, just because I never wanted to be that BJ chick or whatever....If you're wanting a relationship, hold off on the sex until you're sure there will be a relationship...if you don't care either way, then just go for it....I always thought that oral was just foreplay anyway (even if the guy cums...still just an appetizer)....so I'd say:

1. Making out

2. Foreplay (all the oral ya'll can stand)

3. Sex till the 4 walls come down and a bird flies over and shits in the bed

? <----this is the part that ya'll need to figure out BEFORE the sex so that there won't be any misunderstandings or hurt feelings....

good luck!!