Ever Tried Stimulating Your's Or Someone Elses Uretha?

I don't know if this topic has ever been raised by anyone else before ?

While giving oral sex or similar, has anyone ever tried rubbing or using a small vibrator with a narrow tip, or a finger to penetrate / stimulate a womens / males uretha just by accident or attempted it thru curiousity?
Is it safe or risky ? There are some very small sized G Spot vibrators that can be used with lubricant for this purpose.

 

While it's too risky to attempt using any form of implement, oral stimulation with the tongue is foregone conclusion.

 

this has serious health implications so no