An addiction, medically speaking, is when someone engages in an activity that:
causes harm to themselves or others,
prevents them from taking care of normal daily needs, like working, sleeping, eating, bathing, socializing etc,
craves the activity and will harm themselves or others to engage in it,
has tried to stop and is unable to,
and had some realization that the behavior brings more harm to their lives than good.
I see few people who could actually be "addicted" to either sex toys or sex.
Are you using your sex toys to the exclusion of bathing and eating? Are you stealing from your partner or parents or roommates to get money to buy more toys? Have you robbed a bank or knocked over a gas station to get sex toy money?
Are the toys negatively affecting your social life? Do you know instinctively you need to stop?
No? You aren't addicted.