Mike thought "Mmm, maybe, I would like to become a thing. But what thing? There are many things in the Universe, hardly half of them is known, but 0.001% is actually interesting to be transformed into.
It maybe girl's clothes. Just dress, shoes or... Something more intimate, like panties or bra... Maybe even vibrator or buttplug.
Although this options are interesting, there are lots of other interesting ideas. How does he feel about becoming a mannequin? Or maybe sex-robot? Yeah, robots are things too, even if they are Androids.
There are also plenty of non-sexual options - how about becoming an AI that will hack NSA and then destroy the world? Or maybe it will suit Micke to become a rock. Old, big, cold rock. Or part of the mountain. Who knows, maybe it's not non-sexual, maybe Micke have some fetish for rocks...