Sensations in practice I've noticed that in many teachings, books etc it is emphasised that something enters a sense door, sensation arises,then vedana then thought proliferates and I can understand this so far as a sound or smell etc  but what I notice in my practice a lot is not that. What I notice is that thought arises followed by sensation for example a thought of a lost loved one followed by sadness or a sexual thought followed by particular physical sensations.  Can someone please explain this.  what ive read must only be talking about one aspect right? I don't feel a sexual sensation then think about it. Its the opposite.
When your thought arises, it is thought entering your mind's sense door. This is then followed by sensations and/or feelings arising. Because you can't see the subtleties why this thought of yours is arising, you think that it is not according to the teachings.

Putting too much attention on such subtle things as thoughts, sensations, feelings and what arises/comes first, etc. during meditation should be avoided, because most people's meditation skills are not high enough to see these subtle things and their order of appearance. Even if somebody has high meditation skills to see these subtleties, others who are not skilled in meditation could easily misinterpret such teachings and/or think that something is different in their minds, which is not.