"We are HISTORIANS"

So, at school we are learning about the Renaissance, like Leonardo de Vinci and stuff like that. We are also watching a movie about a family called the Medici's who pretty much "ruled" Florence, a city in Italy, which is where the Renaissance first started....blah....blah... Anyways, so there are some scenes where there are awkward pictures and paintings, and every time people in my class always look away and start giggling, laughing, saying "OH MY GOSH" and all that stuff. From my teacher's point of view: "It's not funny. We are HISTORIANS. It may offend you, but we are here as HISTORIANS." Everyone else: "Ya right. It doesn't offend us it's just plain gross."