Ha, dad is exactly the same... What a weirdo !
My theory is that they are so weak and emotional and prefer to pretend to be so strong and independent just not to break down infront of family...
Dad had his knee surgery (ages ago) all alone too... he didnt tell me which hospital he was going to be at !
Guess... love them, dont try to understand them...

I wish he would talk to me more, and give me advices about life though...