My reference to teens and 18 year old guys, was related to webmasters rather than surfers. I can see that 18 year old porn buyers could split into 2 (or more) groups - those looking for peer pictures, and those looking for pics of their friends' mums.
I'm trying to get a feel for the triggers that make 40+ surfers buy, and to see if they are the same as the triggers for 18-30 year old buyers. I can't be wrong, because right now I've no idea if there is even a difference.

But you say that older buyers are more discerning, so I guess there is. Could it be that they want fillet steak rather than McDonalds?
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Baronets (incorporating Domains for Porn) is holding down domain registration prices for this month.
They are still $7.95 - and that's without any asterisks concealing extra charges.