Bath bombs

I have an unrational fear of bath bombs. It's stupid I know, but I guess that's what makes it unrational. I mean I know they're harmless, but the prospect of someone kicking in my bathroom door and chucking one of them into the water like a hand grenade and blowing my nuts off terrifies me. I know that that's not how it works and that there's no way that that could ever happen, but just thinking about it (and i think about it every time i go to a store and see bath bombs) is enough to give me nightmares.

Maybe I should talk to a therapist or something, but I kinda always thought that they were for people with real problems like depression or those people who feel like they were trapped in the wrong body when they born and things like that.