You won't find this Top ten on Letterman. These are a few faves, in no particular order
1) her hot saliva on my cock
2) hot pussy juice, creaming on my shaft
3) a little silicone-based jube or baby oil on her tits
4) something oily or greasy on/in her ass
5) any combination above, or just dry, on my hand working my hard cock
6) all time fave, lots of my hot cum, preferably creampie-ing mouth, pussy or ass
7) jacking off is hot when I can edge, cum a bit, and use my hot cum to lube my hard dick for a glorious multiple
8) olive oil makes a great anal lor tit lube. Kitchen fun! And great for the skin!
9) Lavender-scented Vaseline is a hot ass lube as well.
10) Good old, safe, waterbased lube. My fave is Durex warming lube...a very hot sensation in the pussy!
Have fun!