Whats the answer?

 Ok ...so here`s a question for you...What have the three different pairs shown here got in common.

...they are all briefs ? 
                                      All good answers but that`s not the common theme
...they are all white?
                                                                (answer below)

These three pairs all belonged to someone else before me that`s to say they belonged to three different guys.
I really like owning someone elses undies, knowing there junk,their bulge has been supported in them and the thought that maybe they had a rock hard on while checking out other guys  during their daily life.
As you can see from one of the pictures in particular they get me oozing and definitely HARD!!!