{1} Lost Loved Ones: If there is someone the groom was really close to that passed away, pin their picture into the boutonniere. That will keep them close to his heart as he passes this milestone in his life.
{3} Paper Flowers: Though this idea is not an addition to the boutonniere, it can have more meaning to him than a flower boutonniere might. Maybe it can be made with sheet music to his favorite song, or a song from a movie he loves. It could be made with pages from his favorite book. Another idea is if you ever give him love notes, he can copy them and use the copies as his flowers for the boutonniere.
{5} Lego Man: This can really translate to anything your groom wants to showcase. Legos come in all sorts of brands and characters that he can have his pick and pin it in! This Joker one is super funny.