Dildoes will be safe for most people when used properly. That means applying a generous amount of the right lubricant and not pushing yourself into a certain size range before you’re ready. It’s also critical that you keep any and all of your sex toys clean, as bacterial buildup can create hazardous situations for extremely sensitive body parts. In extreme cases, dildoes can cause injury, with more than 1,000 occurring per year in the U.S. between 2000 and 2019.Forrester, M.B. (2021). Vibrator and Dildo Injuries Treated at Emergency Departments. Journal of Sex & Marital Therapy, 47:7, 687-695. A modicum of restraint in the heat of the moment can mitigate a lot of this risk.