✔ 最佳答案
I am not really sure about its safety. Because if you're going to talk about its openness to infections, I think it's not mutually exclusive to butter--many people use saliva and THAT has MORE chances of giving infections.
Some homosexuals use Olive Oil for this. Butter is almost the same banana with Olive Oil so I guess it will be fine.
HOWEVER, I don't think it's a good idea because butter is for bread. There are specific things to use for this such as a sexual lubricant. They are not expensive at all--some are in sachets and are more affordable. Lubricants are also easier to use as compared to butter because lubricants will just be applied to your prives. Butter needs to be melted--and I can guess that it is messy! Also, it ruins the sheets, doesn't it? :)
Wash your prives after to avoid ants.