1. Getting blown, standing up, by a woman kneeling from me, while I am kissing my gf, also standing in front of me.
2. A double triple blowjob
3. An orgy, with everything everywhere happening all at once
4. My gf wants to get gang-banged, so: my gf getting gangbanged
5. A week-end of full on sex with friendly couples, in a sunny place
6. Sex with people of different ethnicities than mine

Considering that my gf and I are embarked on a swinger journey, I hope I'll revisit this list in a year, adding checkmarks. :)