Vaginal stretching
Vaginal stretching refers to the careful, gradual widening of the vagina, for example as preparation for penetration with several fingers, larger sex toys, or in the context of fisting. In BDSM settings, this should never be rushed; it requires plenty of lubricant, good communication, and sufficient arousal. The comparison with anal stretching is only partially appropriate, because the anatomy and load-bearing capacity are different.
Special caution is necessary: pain, bleeding, or a strong feeling of tightness are warning signs and not the goal of the practice. It should only be done with the consent and physical readiness of everyone involved; if there is any uncertainty, pre-existing conditions, injuries, or discomfort, it should be avoided. Objects such as bottles are unsuitable and risky, as they can cause injury, vacuum effects, and getting stuck; such practices should not be performed. Larger objects or extreme stretching do not belong in a low-risk application and can cause serious harm.