Can sucking Vagina causes any infection or is it safe to do that?
If neither of you have a STD, especially herpes then you won’t cause an infection. It is safe. However, if you have oral herpes (e.g. cold sores) and you suck on a vagina during an outbreak (when you have a open cold sore) then you can pass the herpes virus from oral to vagina, although oral herpes is HSV1 and genital is HSV2 and they both prefer their dominate region, either strain can be contracted in each area. If you have oral herpes, you can also pass the virus when you are not having outbreaks which is called viral shedding and occurs anywhere from 4 to 10% of the year, sometimes even less. There is also a very slight chance that if you happen to have a oral bacteria infection you can pass that infection to the vagina but this would be a rare circumstance.
