Bradford pear (Pyrus calleryana) and the smell of semen

Bradford pears are about to bloom.  Tends to be a showy affair especially when they are in clusters (in Custer Av near Main St in Evanston, IL, for instance).  I can't say that I have noticed it, but to discerning nostrils apparently the early bloom smells like semen, which in turn some folks suggest smell like fish (see here).

Here's what to look for:

The bark is fairly distinctive so take a close look