I think that's how most of us learned to drive from sitting in our parents lap..now they have driver's ed, how boring !!!!
You'll never regret all the time you spend with your sons..pretty soon, they'll be too busy with lives of their own but they might send you on a "Meatloaf and The Boss Oldies Reunion Theme Cruise sponsored by ******" when you are old (in your case old starts at 80)
The best part of when your sons grow up they become fathers and have sons that you can hang out with (I'm experiencing that now and it is great to take 2 /1/2 year old grandson in the turbo beetle like I did his Dad)..the second best part your sons will attract younger women for you (VBG)