Do you wait for a new love to invite you to leave a toothbrush at their place or do you just start creating your own space?

no, you get pregnant first and then you go: "woops, guess who this belongs to? *wink* *wink*"

if you just leave your toothbrush out of nowhere, it might freak them out a bit.. instead, you'd want something romantic and subtle. ;)

It's complicated. 

~

I'd probably wait but then I know I am far too unassuming and perhaps that's a fault of mine.. I used to just have a spare toothbrush in my handbag.. lol saves a lot of soul searching :P

i never seem lucky enough to get a boyfriend in the first place

No.

I would just keep one in my bag.