Boom mic is visible at (or very near) 3:40.
When looking at the "Playpen" magazine, Elliot and Carla talk about the centerfold having a teardrop tattoo on her vagina. The entire structure of the vagina is internal to a woman's body, so even if there were a tattoo, it would not be visible. Doctors and nurses would know the correct names for the visible external body parts where a tattoo would actually appear.