Speaking in terms of how it was when I was that age... my most fondest memories is of how my late Dad handled that, and how close we were to him as a "Dad."
His "style" of Parenting... was that he ALWAYS made it clear to us that he was ALWAYS there for us... without nagging. That we could ALWAYS talk to him about ANYTHING, not matter what... AND WITHOUT JUDGMENT. No, he didn't act like a "buddy"...but rather, a Parent who loved his kids no matter what, unconditionally. He was always proud of us, even if we were different in philosophy or opinion or personalities.
Sometimes, when he knew something was bothering us... he'd stay up late at night, making like he was just watching t.v., but he "knew" that when we were ready, we would initiate a conversation...about what was bothering us. It was very comforting and non-confrontational...which was very productive at this age.
I remember another time, when as a teen, I had painted my bedroom in a "cool" abstract design...ALL the walls. I was SO proud and when my Dad came home from work, I showed it to him excitedly. (Note, that I was not "afraid" of him or showing this to him)....and upon seeing my "creation" and seeing how "proud" I was... he did NOT yell or scold me...but RATHER told me how "creative" I was... and how good at art I am... and that if I want to take art lessons, he'd look for some good classes for me. I knew he was sincere and not just telling me a "fib." He too had extensive art and design background and was a true "Renaissance Man"... so his attitude on this was very different than most Parents. However, seeing how my Dad reacted to me and handled the situation... I REALLY learned about life, and appreciation, love, and respect. I really also respected HIM for that too, and learned about "honoring" my Parents.
He was never a "hammer" Parent...but rather, gave us wings to soar with, and respected us. Individually. THIS is invaluable to a child and their later development.
Later, when we were "adults" my Dad explained that he did this because he wanted us to feel "safe" and happy at home... thus, preventing us from seeking negative outside influences and dangers.
As a Mom... this same approach can work. ALSO, with boys... you must encourage communication and expression of their feelings....so they don't get all pent up and frustrated.
No matter what "phase" or manner of dress we went through.. he always showed an interest in our lives...without having to nag or "control" us. But yet at the same time, he instilled enormous values in us, and appreciation for life and it's lessons.
Just have a "grown up" talk with them... let them know that you understand them, and are ALWAYS there for them too.
Growing up this way, in the manner that my Dad "taught" us, unconditionally, was so so great. We were closer to my Dad than my Mom... although they are both loving Parents.
All the best,
Susan