I can see Prowl getting back into poetry after Bee got resurrected.
In the time Bee was gone, Prowl has fallen into a very dark place and had little life in him. He neglected anything that wasn't a nessecity for survival- hobbies, relations and his garden.
After Bee came back he made sure to reintroduce Prowl to things he liked so he could become his old self again. One of the things he liked doing was poetry.
Writing poems was something he didn't pick up for a long time; each idea he tried to use turned into sorrowful flashbacks to that dark chapter he tried to escape. He just could do anything that wouldn't end up in him silently crying on the floor, replaying all the events in his mind.
One day Bee had to assist with something and Prowl couldn't join him, Bee knew that he'll be sad so he gave him few of his stuff to keep him occupied; a console, some toys to fidget with and few comics and books he liked.
Prowl found something poetic in the way the comics described its characters, it gave him a sparkle to try poetry once more. He tried writing in his usual style but it just wasn't working, he feared it will end up like every other time he tried. But then an idea struck him and he tried a different approach; he would try to describe something instead.
Something happy, cheerishable and hopeful... something that brought joy instead of sadness. Somethign like.... Bumblebee.
Every little thing he knew about the yellow scout he poured onto paper. Multiple pages were just bits and pieces of Bee; his smile, his optics, his character and behavior- even something as silly as his preferences in hobbies.
Each and every poem he wrote was about Bumblebee. He never told Bee about it; he feared that if Bee ever found them he'd think Prowl was being creepy.
I think Bee would find one of those poems after they start dating. He'd read it and ask Prowl about it and Prowl would have no other choice but to tell him about those. Of course Bee would push that Prowl reads them to him.
They ended up cuddled in Prowl's room, Bee listening to Prowl's works praising him and he'd be so impressed Prowl managed to put his somewhat humble being in such a beautiful way.
His favorite so far was this one;
My Hope, My Haven, My Happiness, My Sun. World's Beauty is endless, wild and free, From Colorful Skies to Deepest Waters, Birds with Song and freedom. Saharas and Deserts, glowing with their golden sand. Lush Forests and Jungles, holding many wonders of life. Streams quietly trickling, looking and finding their way to the unknown of the Ocean. Skies, unbound and untamed, forever changing each day of life. World's Beauty cannot be contained, and yet I can see it each day right in front of Myself. Your Eyes reflecting the Skies, the Lakes and Oceans. The prettiest of Songs heard from Your Voice. Mesmerising colors of hottest Sands and Praires woven with strings of Night, for it is a Veil You wear each day. No travel or flight can give more, Each and Every aspect of Beauty known is with Me. It wanders and plays, sings and runs away as I try to chase it. World's Beauty is right here, just barely in reach. And in patience I'll wait until one day I may call it My.










