So I work in the film industry and I spend a lot of time hiding microphone packs under actors' clothing.  Recently I noticed that several actresses have been making the same comments when I place the pack on their thigh because they are wearing a dress: look I have a dick now!  I am not out at work and I don't think that these actresses mean to be transphobic when they claim that having a mic pack attached to their thigh looks like they have a penis.  (You can't even see it through the dress, that's the whole point of hiding it there!)  Am I being overly sensitive or is what they're saying actually inconsiderate?  Also, what's the best way to address this?  Most of these women are my bosses and/or well regarded in the industry and I can't afford to ruin my reputation when I'm this close to joining the union.  (Union = health insurance = access to HRT)  Any tips to approach this topic courteously? 
-eliot