Good grief! This just reminded me that I sent an email a little while back, asking why such a fine, upstanding and only slightly senile personage such as myself, was still unable to PM.
So....I picked a posting at random and clicked the pm box, only to find that I CAN now use this facility if desired.
The random Avatar I chose was someone called "Chainsawstalkingreligeousnutter", or something like that.
I thought that I would practise my PM'ing, so I sent him a quick message, inviting him round for tea in the garden next Tuesday.
I hope he's a nice chappie.