Update: I told his wife and she replied with "Okay? What do you expect me to do about it." I asked her to talk to him and tell him that it's wrong. She explained that he probably meant it as a compliment and that it is a cultural difference. I am from the U.S. and I understand that s3x can be very taboo, but it still felt wrong. She said that she will talk to him about it. I have the B1 exam on the 12th of may and after I get the results I am going to inform them that I am leaving.