Hi Steve
Informed consent, equates to you being informed of what this or that procedure entails etc, you are then supposed to agree or disagree to what is offered, that is the way informed consent works.
In this instance you should have had the area and muscles explained so you could make up your mind before the procedure started, it sounds like the person who gave you the treatment knows what they are doing, unfortunately they did not explain this to you fully before getting your informed consent.
As some of the muscles are situated beneath your scrotum, then your bits are usually just moved out of the way (this should have been explained), if you want this problem sorting out, then unless you can remove your bits before the treatment starts and put them back on later, then they are in the way and need to be moved out of the way as much as possible, unfortunately males are not as tidy as females down there.
Please look in an anatomy book at the muscular system, especially the ones which go around and through the groin which need working, you should have a more complete understanding of what needs working to effect a change.