Photos of female masturbate with dildos, objects or sounds fucking the uterus, cervical penetration with japanese vibrators, cervix playing sex with large diameter insertions until deeper of the womb and porn images of electrostimulation with powerful german electric e-stim device.
The insertion of objects, dildos or sounds by the channel of the cervix, as well as the etimulation fingering of the exterior zone around the cervical neck is known like "cervix play".
Generally it is the exterior stimulation though some persons introduce small objects 2 or 3 cms or the phalanx of a finger for the channel of the cervix. This sexual practice is dangerous fetish for the risk of infections. Much more dangerous and painful it is to introduce objects or dildos inside the uterus. Cervix play is amazing porn but it is not an advisable practice sexual.