Ok those boxers just make me think "wow if I ever want to get pedobear boxers and take it to the next level lol I know where to go shopping!"

As for going for a piss, the obvious answer is to undo belt, waist button and fly (especially if wearing button fly jeans) and to then take a powerful stance where your arse and thigh muscles will hold your pants up whilst your "spare" hand pulls the waistband of your underpants down to tuck behind your sack and then with the other hand aim the cock and release! Followed by, "ahhhh" and then flipping the big bad away and buttoning up and washing hands.

That or the soloution is simple, don't wear undergarments and then it's a case of merely skipping the "spare" hand's duties.