I never find these funny like most people. I just see men being shamed for their genetically required responses to visual stimuli.
The female body is attractive to straight males. There's nothing wrong with that and there's nothing to be ashamed of for accepting it.
You can have great art that you love and cherish at home, and still enjoy beautiful art that you see at a restaurant or museum.
Real relationships are not threatened by looking at what's around us, it is after all who we choose to spend our time with that matters much more than what we occasionally look at.
Let your partner enjoy a look, it is often involuntary and done without conscious thought. If you're relationship is weak then being fearful and shaming will hasten it's demise. If it however is strong, than it (and you) has nothing to fear.