Why Main.createIssue() function is called?

Hi! Even though I don't have null member of the list function Main.createIssue() is called for every single word from the list. Why?

package com.functional;

import java.util.Arrays; import java.util.List; import java.util.Objects; import java.util.function.Consumer; import java.util.function.Predicate; import java.util.function.Supplier; import java.util.stream.Stream;

public class Main {

public static void yell(String word){
        Objects.requireNonNull(word, "Created issue" + Main.createIssue());
    System.out.printf("%s!!!! %n", word.toUpperCase());
}

private static String createIssue() {
    System.out.println("Some external API call to a bugtracker");
    return "#23123";
}

public static void main(String[] args) {
    // write your code here
    List<String> bodyParts = Arrays.asList(
            "Dupa",
            "Nie dupa",
            "Znowu nie dupa",
            "Ręka",
            "Noga",
            "Mózg na ścianie"
    );

    bodyParts.forEach(Main::yell);

}

}

CONSOLE:

Some external API call to a bugtracker DUPA!!!! Some external API call to a bugtracker NIE DUPA!!!! Some external API call to a bugtracker ZNOWU NIE DUPA!!!! Some external API call to a bugtracker RĘKA!!!! Some external API call to a bugtracker NOGA!!!! Some external API call to a bugtracker MÓZG NA ŚCIANIE!!!!

Process finished with exit code 0