Apparently I've been pissing wrong for my entire life.

Recently I attended a wedding. I was complaining to a couple buddies of mine that were there that I always hate dressing up in suits because taking a leak is always a pain in the ass, having to undo everything then redo it all back up. They all looked at me confused, and asked me what I meant and asked me to describe my process. I've been completely undoing my pants when taking a piss. Belt, button, untuck shirt, the whole nine yards. I've done it this way for 26 years. They all laughed at me and said you're supposed to just unzip your zipper, fish it out through the zipper and piss that way. I've never done it this way once and it hadn't even occurred to me that that's what the flap in underwear is for. I've never questioned it. Do ALL MEN piss this way?? Does anybody else just undo everything like me??? I feel so silly. Edit to answer questions: No, my pants aren't at my ankles when I piss. No, I wasn't that kid in elementary school. My pants don't immediately fall to my ankles after undoing everything, I don't have to hold them up. If this happens to you, you have a really flat ass or are wearing the wrong pants. "Didn't you see how other people were doing it and realize you were doing something wrong?" You're looking at other people when you're in a bathroom? You're mad weird for that. I'm focused on me and I don't pay any attention to anyone else. I also rarely use public restrooms at all. I only use them if absolutely necessary, I'll hold it all day until I get home. I have astounding bladder control.