Since you said this question is open to gentlemen too, I?ll venture.
P411 hand down, from what I hear from the ladies. Verified Status on OH2, being a Premium Member on ECCIE, being on PacePro, all add to the trust. Nothing can replace the good old screening with 2-3 providers that a guy has recently seen.
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The following might give an indication of what works on the ladies side, so that we, men can adapt to these:
1. I got my first break on p411. I heard of it on a podcast by a Provider girl out of Canada. After I saw a few (my first 3 okays were the hardest), I was all good. So Ladies probably trust P411 the most.
2. I have head they also cross check a guys number with Mr. Number. Apparently, no comments is good, one or two positive comments are really appealing, from what I hear.
3. Then there is the companion forums. I am sure there is a lot of discussion about some guys, especially the ones with Alerts.
4. Also, ladies can get a good sense of a guy from the forum history and the reviews?here and on ECCIE/TER.
5. Some ladies bank on proactive referrals from other provider friends who have seen a guy and like him enough to recommend him to them.
6. Finally there are things like TER Whitelist, Privatedelights provider responses to a review blurb etc.
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Ladies, don?t flame me for taking the liberty to write about the process. While this might not be fully accurate, this is what I heard from several provider friends of mine.