Apparently, Geri has lifeskills to impart. Like this one, she offered to Victoria Beckham:
"One of the things Geri taught me... was that just before you get out of the shower, you should turn the temperature down and get a blast of freezing cold water. It makes your skin look really taut and smooth... and it's great for the circulation."
We presume the other things Geri taught her were too trivial to mention.