My friends don't hold back? ?

Well so all of my friends (guys and girl) are so straight forward like today at lunch I was sitting with al my friends and my friend mike came over and my friend Julie was like 'hey mike how big is your d**k?' and then Julie and mike and everybody laughed but o just felt kind of awkward. I'm not trying to sound like a brat or anything I mean I thought it was funny too but just hearing words like di*k or t*ts makes me uncomfortable. What should I do?