because I couldn't carry my 55kg grandfather from the wheelchair to his bed after he soiled his pants.
because I was woken up by a telephone call at 7a.m. for of an emergency: my grandmother couldn't lift him and called us because my uncle 'didn't want to be disturbed'.
because he refused to let us help him
and he had no strength to do it himself, but insisted he could do it when he can't move his legs.
you asked me why; so, for various reasons.