whale boners

If a whale is the biggest mammal shouldnt it have a super huge boner? i went to the georgia aquarium this weekend and saw a beluga wale. This whale didnt give a fuck about exposing its genitalia, It was just swimming around letting it all hang out. But despite its massive size, I couldnt see its boner. Could someone better versed in biology tell me why the whale got shafted like this and has a miniscule peepee