I have nine inches of cut cock and agree that precum and spit mixed together provides for a pretty awesome masturbation experience, BUT I recently discovered, KY warming fluid (not to be confused with plain old KY in the tube). They also have a KY Warming gel. I have had awesome ejaculations using either one. The gel is real thick. Boty stay wet and have a mild sexually warming sensation.
I do remember the first time I used the gel about a year ago, it was totally awesome, but I cummed way too fast. I think the KY Warming Gel would make for an awesome RAW fuck.
I have chatted with some dudes about this on MANHUNT.net
and it seems lots (mostly cut guys) like the KY warming products.
AWESOME DRY JACK: I also enjoy a good dry jack using just a little bit of talc powder on your cock. Provides for a totally different sensation. If you have not tried this, be ready for a significantly different feeling as you stroke your cock and ejaculate your seed. I really recommend that you give that a try.
I go in phases, sometime i dry jack with talc powder for weeks and then go to spit and pre-cum and then go a few weeks exculsively masturbating with KY warming fluid.