Hi Panthers_Den,
I do a lot of brisk two up riding with my partner. She is the best pillion I have ever taken on the back of a bike. A good friend of mine recently told me we were the fastest pair he'd ever met. I should qualify that by saying last weekend a BMW 1200S one of those new 163hp jobs left me behind on one of my favourite roads! There is always someone better!
My advice about pillions;
1) do not take anyone on the back without the same safety gear you wear;
Boots or solid footwear, good armoured jacket, preferably armoured pants, gloves, full face lid.
2) If they are not en experienced pillioj go easy and don't scare the***** out of them, they may never want another ride if you do.
3)Who ever it is even if another rider (doesn't mean a good pillion) take it easy until the pillion and you are comfortable over a few rides with what and how you ride. If they aren't a good pillion and panic all the time maybe they shouldn't be on a bike at all.
Taking a pillion requires a more smooth riding style, allow more braking distance if travelling quickly and be aware things that scrape are more likely too with the extra weight.
If you are going to have a bit of a race remember you have someone elses life in your hands.
I could dribble on for ever about this so I'll give you all a rest and shut up.
In short some people can pillion and some can't.
enjoy your ride.
davem