If you have good shaft skin movement, and can pull some skin over the head even when erect you are "loose cut". Count yourself lucky.
If your shaft skin feels tight and there is little to no movement when erect, you are "tight cut". If your dick will not move and the skin feels like it is going to rip when erect, you are "very tight cut". FR or just a little skin expansion would be beneficial, both towards overall health and enjoyment, and your Penis Enlargement efforts.
FR can cause a little bit of size reduction...IF you are cross taping or otherwise binding the skin of the penis for long periods of time to tense it AND you do not do any stretches when removing the binding. I have had a permanent increase in my flaccid hang because I always stretch and jelq after removing any binding. Extra skin + stretching = better hang. I'm not the only one who has noted this.
It also follows that if binding the penis for periods of time for FR causes shrinkage, too tight a cut can also cause some of the length of the penis to be constrained during puberty...stunted growth...Doing FR can lead to a larger penis. Many men who only do FR have noted permanent size increases. It's well-documented (and lamented) on FR-exclusive forums and mailing lists.
And, yes, your balls do have something to do with your penis. They share alot of the same blood pathways. I discovered this while pumping. Just out of curiosity, I decided to throw the berries in the tube and pump them. This, for some reason, cut off the blood flow to the penis, making it turn purplish. I thought it was very curious. We know that FR helps with ball hang. Almost all FRers report better ball hang. And more horniness. Better erections. It all seems connected somehow...dick, foreskin, balls, horniness, erections, orgasms.