From what I can tell, most people think of Oral sex as light play and the term is soft swing. It's what most people are willing to do when they don't want to go to full intercourse with play partners. Full swap is willing to have intercourse with others but few do anal with anyone but their partners. Check out the Dictionary here, it will help.
And if you missed it, some couples have no kissing rules....they can lick and suck and fuck but not kiss anyone but their own partner.
Just make up your own rules around your comfort zone and expect it to change as you grow and explore. We found our rules changing so fast we screwed up at times....so I suggest you not only talk it out but if necessary, write them down for both to see the changes as they happen. And be accepting of a few mistakes by you or your partner cuz misunderstanding occur-I mark ours down to changing rules toooooo fast and not always both being on the same page at the same time.