RE: letting down poundage
The problem most have with turning a bow over to allow someone else to shoot, especially from an adult male to a girlfriend or child, is that they have a twofold dilemma. First, the poundage is normally in the 70# range and can't approach the average 40 pounds needed for this group of potential shooters. Second, the draw length is usually too long which puts the force/draw cycle at a very awkward status for them.
This is where a good PRO Shop is necessary. I'm not saying that it can't be done, just that we see too many cases where it shouldn't be attempted. It can ruin the future of the potential archer.
Hope this helps.