Why are husbands miserable on vacation?

This is a genuine question. I am on vacation currently with my suddenly sullen and miserable ass of a husband and our kids. Highlights include:

-Snapping at the kids for extremely minor "offenses" (everywhere we've been, we've been complimented by strangers on the behavior of our kids)
-Mopes all day when I don't drop everything to go do "his" activity (he wants to drag our young kids to sit at the bar rail for a beer. He wants to go on adults-only rides RIGHT NOW. This, after getting hours of personal time at bedtime every night to go have cigars, go out for evening drinks with friends, etc, while I stay with the kids)
-Rude and sullen to other adult family members also traveling with us
-Complete intolerance for being hungry
-Irritated that he hasn't "gotten any" on this vacation but won't actually say it
-SOOOOOO TIIIIIIIIRED every day (I did every ounce of pre-planning and have taken care of everything. He just had to show up)

We have traveled to a destination he loves. He is eager to go every year. I have not held him hostage. So why is it like bringing a hormonal teenager/extra kid every time we go on vacation? A lot of my personal desires aren't being met in any way, shape, or form, but that's okay because I have been making so much magic for our kids. If his desires aren't met, it is a truly unacceptable inconvenience. I see a lot of posts on this sub that echo the same sentiment. I really do believe in the fundamental differences between men and women that make them better suited to different tasks, actions, and environments. So I'm dying to get some insight. What makes vacations so miserable for men?!?!