Well! 

Now he had to go through Samaria. John 4:4

For me this story is a real object lesson in evangelism. 
The encounter wasn't planned in advance (except in the heart of Father God ... Is that why it says 'he (Jesus) had to go through Samaria? or is the writer just relating a geographical necessity?).

Jesus meets a stranger ...

• makes himself vulnerable ...     'Will you give me a drink?' v7

• sows a seed of truth ...              living water v10

• get's a response ...                     'give me this water' v15

At this point, no doubt, we would start to explain the ABC of salvation ... but not Jesus. 
He is not looking for an intellectual response but a life change. 
The living water Jesus is offering must be allowed to flow through every area of the woman's life including her deepest hurts and needs. 

And so he addresses her past and present relationships.

As usual a conversation of this sort is littered with pointless and peripheral theological questions. 
    Who's well is it? 
    Where should we worship?

In the end it wasn't the theological conversations that won the day. 
It was the spiritual discernment given to Jesus that enabled Him to reach into the woman's heart. 
'He told me everything I ever did.' (v39)

Perhaps one of the lessons here is that when we 'share the gospel' with someone, we are not just 'sharing a message' we are interacting with a person.