It's not necessary, but seriously... who's going to stop him if he wants to do it? ^^ I believe in balance... ^^ Even in this kind of situation there's always a way to create balance.

It depends. I feel myself a little guilty when he payes but still it's pleasant

Depends the situation

I agree with Jennifer's opinion.If a boy insisits on pay the bill ,I won't arguing over with him.What I must do is to pay for the next one.

If the man insist to pay ,I don't mind it at all. But I won't expect him to pay everything. Maybe for the next date, I will offer to pay for him. So, it's fair.