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Avoid brushing your teeth or using dental floss before oral sex because it can cause your gums to bleed. If you use lubricants, only use water-based ones, which are available from pharmacies. Oil-based lubricants such as lotion and moisturiser can cause condoms to break or fail. Infections can be passed on even if the penis doesn't fully enter the vagina or the man doesn't ejaculate (come). Dealbreakers included poor-quality materials, a short battery life, a tendency to break easily, a lack of power, and a design that was awkward, inconvenient, or painful to use