Are you sure that is a suguaro ? I lived in Arizona for over 25 years, and suguaros are the giant cacti that are the state flower. Of course, I have never seen a "baby" one, and they are very large and have a different kind of flower. Google "suguaro " and see what I mean. Not trying to be ornery, I just have never seen one like that.
Thanks for showing your pretty cactus blooms. My mom used to have one similar that was a Night Blooming Cereus that smelled heavenly. Yours looks sort of like that. :)