What are the down sides of introducing toys into couples sex?

I’ve been thinking about the sex me and my girlfriend have been having, and it just seems to be getting boring. Im looking for new ideas for stuff to try. ( its not that were bad, i always finish the job, and shes always makes sure that she takes care of me, its just, repetitive.)

I was thinking about trying some joys out with her, but i know that some things can be very hard to beat, and im really not looking to be replaced by some plastic.

i mean, were having a fair amount of problems, so im really not looking to be lacking in the one area im really good at. ya know?