i need some advice...

I asked for 2 days off this month (2 weeks notice) each day a week apart.

My bosses response was that he was worried about getting all the work done and that he wanted to discuss it with me... ( i can't remember the wording but that he wants to know why I want off)...but not to take it as a definite no.

I was in too much of a mood to talk to him about it today... first off why should it make a difference to him whether I'm taking my mother to surgery or getting a pedicure... either I can have off or I can't.

here is my thinking about not telling him why I want off...
1. It feels like begging to me. Like if I can make it sound urgent enough or important enough he will say yes... but if not it will be no.
2. I feel like its unfair to him as well. If I need to be there, then he needs to just say no. I'm projecting here but I would feel bad telling someone in my situation no.