What does it mean when a man doesn't go down on you for a long time and only does it when she asks? Like he does it only for a few seconds when she asks and then wants to jump to the next part straight away.

It means one of three things.

1. He really doesn't like it.

2. He only wants to get his satisfaction and doesn't care about yours.

or 3. You need to freshen up.

I said this earlier today. If you intimate enough to exchange body fluids, then you are intimate enough to exchange words. Have a conversation, about what you like and what you want.