Payback Time

Meet my brother Ralf.
Ralf is younger than I am.
He is four years younger than I am.
I am older than Ralf.
I am four years older than Ralf.

Where was I, now that all the important facts are established? Ah, yes, one of my brother's many talents is the ability to fall asleep at will at any time of the day and whilst in a crowded room. Here's the proof.