Thanks guys and gals, it's nice to know others have the same problem. I guess it's more of a problem recently because I am single these days and quite happy to be single, at least while I sort my head out. I guess I will also have to also sort my loins out too!

I have to say when I have been in a relationship and like this, the lady in question generally hasn't minded me being like this as long as they understand what's going on when it all vanishes. I hate it if any future partner felt rejected by that.