Aren't you familiar with this easy riddle?

[important_bizniss]

It's a last name, of course.

 

[important_bizniss]

It's a last name, of course.

 

[Damilola Molumo]

mens' last name

 

[Sparkle Johnson]

What is it that all men have one of; it's longer on some men than on others; the pope doesn't use his; and a man gives it to his wife after they're married?

 

[wowza-]

His surname =)

 

[imported_Damilola Molumo]

mens' last name

 

[Ryu Z]

since the correct answer was already taken i'll say his penis.