Nude Models and boyfriend

Above is an ink drawing of a nude model . Probably one of my favorite things to do in drawing class is when we have a model. Each person is different and so interesting, now having the experience of my subjects infront of me, i no longer want to draw from a photo that has already flattened out the object for me.

Having nude models was routine to me, even in highschool, we had one a day and i had double visual art classes so i would draw 3 hours a day with the same model. I loved it.
Then my boyfriend decided to come into my class when the session was over. Now my boyfriend is not an art person you can say. He walked in and came to the sink where i was to say hi, he turns around to his horror....the model was still naked despite people were already leaving and entering the room. My boyfriend with a face like this O_O and scream-whispered to me OMG SHE'S STILL NAKED! and ran out the room.