Overview
Real Men is a 1987 American comedy film starring James Belushi and John Ritter as the heroes: suave, womanizing CIA agent Nick Pirandello (Belushi) and weak and ineffectual insurance agent Bob Wilson (Ritter).
Plot
After scientists accidentally spill a deadly chemical into the ocean that will eventually kill all life on earth, a group of aliens offer to help humanity. They offer a choice: the 'Good Package' to clean up the mess, or the 'Big Gun', a weapon capable of destroying the planet. The aliens only ask for a glass of water in return, which must be delivered by CIA agent Pillbox, the only human they entirely trust.
While on a run-thru of the alien meetup, agent Pillbox is shot and killed in a forest by an unseen assassin in an inside-job. FBI computers find Bob Wilson, an insurance agent who looks just like Pillbox, and suggest sending Wilson in Pillbox's place. However, Wilson is a meek office worker who we initially see being easily pushed around by a group of local bullies and by a milkman who is trying to seduce his wife.
Tough guy government agent Nick Pirandello is sent to recruit Wilson and escort him to the meeting; he is also to build-up Wilson's confidence and decrease his insecurities. He meets Wilson at Wilson's home, with Russian agents close on his tail, who want a unique map to the meeting place. Wilson thinks Pirandello is an intruder and tries ineffectively to attack him, culminating in a shoot-out with the Russians that devastates Wilson's house.
From Wikipedia (CC BY-SA 4.0).