The only time I am untucked is when taking a shower... Well a synopsis of my shower is actually I start my shower tucked, and then when I get to washing the area I untuck, wash, retuck. Same as per once out of the shower, when drying, untuck, dry area well, retuck.
And of course when going potty, I untuck. I had gone once while tucked, just instead of taking 30 seconds to about a minute, it took well over 5 minutes just to pee.
Heck, I even sleep while tucked, though half the time I wake to being untucked. Though it comes easy for me to tuck it literally takes me two seconds for a quick tuck, though to get a good 8 to 9 hour tuck, I use the comfort of my own bathroom, one hand from the front generally tucks the testicles into the cavities, as well as pushing the penis back, and reaching from behind to grasp the penis, while bending the knees into a deep squat, once getting a good position for the penis, I then stand from the squatting position, upper body remaining slightly forward then straightening out. Once I stand straight up then with knees together, I squat down just enough to get my panties up and that generally gets a good 8 to 9 hours to remain tucked.
The only other time I will need to be untucked, well it hasn't happened yet, but may come down to it is when it comes down to the military and their love of conducting a urinalysis. During that time I will not be able to have the comfort of wearing my panties at all, but in the whole way of essentially if it comes to that I can thus in a way conceal undergarments in cargo pockets, and switch out once done.
Kate <3
