I would not have thought it possible for one short film to have so many poop jokes and so many opportunities for the leading character to take his shirt off. And yet, here is Playing with Fire. Take that, people who say Hollywood never teaches us anything!

Was anyone really waiting for another version of “Mr. Nanny” (7% positive ratings on Rotten Tomatoes). I didn’t think so. And yet, here we are, with another WWE star playing off his ultra-alpha-male vibe with a cuddly comedy about how a super-macho guy finds his tender side by bonding with adorable children. Not a bad idea. If only they had a better script.

John Cena is a gifted comic actor, as we saw in “Trainwreck” and “Blockers.” So it is near-criminal to put him in a movie like this and give him nothing to do but glower, do silly dances, take his shirt off, and jut that lantern jaw. But that isn’t enough. It also under-uses the immensely talented cast, including Keegan-Michael Key as the loyal second in command, Judy Greer as a nearby scientist who has been on two and a half dates with Jake, John Leguizamo as a smokejumper who cooks everything with spam and makes up weirdly inapposite quotes, and Dennis Haysbert as a commanding officer). Brianna Hildebrand as the oldest of the rescued kids has been given a character with less range than she has in the “Deadpool” movies as angsty adolescent Negasonic Teenage Warhead.

Cena plays Jake Carson, who leads a group of smokejumpers, specialized wildland firefighters, who parachute into remote and rugged terrain. (See “Only the Brave,” based on a tragic true story for a more serious look.)  He literally grew up in the smokejumpers’ remote outpost because his mother died and his father was the supervisor. It is all he has ever known and all he has ever let himself care about. And now he has a chance at his dream job, overseeing the entire region. The current holder of that position, Commander Richards (Haysbert) has encouraged him to apply and has scheduled an inspection visit.

But Jake’s resolutely immaculate operation has been thrown into chaos. Half of his group has just defected to a more high-profile team. Jake has just rescued a teenager and her two young siblings and he can only release them to a parent or authorized guardian. And gosh darn it, those little nippers are always getting up to something, whether filling the garage with bubbles, or filling a diaper with, well, you know. Merry mayhem, followed by hugs. Did I mention that Jake says he never cried? And so he Googles “Is it bad if you’ve never cried?” This is not a movie that is going to let even the most inattentive audience member miss what it is telling us.   Key’s helpless responses to the teenager’s “Or what?”) smothered by clunky slapstick and lazy characterizations — the little girl has tea parties; all the smokejumpers are men and only the little boy is a potential fire fighter.  Even at 90 minutes, it drags, the few bright spots (some silly dances, Greer talking to the toads she has provided with a tiny lawn chair, the My Little Pony references until they over-do and then over-over-do it,

Parents should know that this is an action comedy with peril and action-style violence that may be too intense for younger children. There are references to the sad deaths of parents and the failures of the foster care system. Characters use schoolyard language and there is extended potty humor.

Family discussion: Why couldn’t Supe answer the question on the application? What is the toughest part about trying to balance work and family? Do you ever use sarcasm?

If you like this, try: “The Game Plan”