they are talking about their families and find out that they have more in common with each other than either of them though.
The idea is Spike grow up with his own family gets hurt and crash into sweet apple acres,
sins he is blinded from his injuries fore a wile he cant see and he does not realize that the beings that are helping him are ponys and not dragons. Normally he would think of ponys as nothing ells but lower beings or even food.