I've read the reviews on this Pop Up Glory Hole and while the reviews are positive, my issue with this is, not the 'is it a He, She or Tv/Ts' conundrum but one of a health aspect.
This person could easily have a cold sore or mouth ulcers. If it is a cold sore (Oral Herpes Simplex Virus 1), then they could easily transfer it to you and you could end up with Genital Herpes (Genital Herpes Simplex Virus 2), this is with you for LIFE, You can never get rid of it and if you do have an outbreak, it can look very unsightly.
If you are single, then this will be something you have to explain to future partners.
If you are married then i'm not sure how you can rationally explain it. If your partner does a little research, then they will know that it can only be contacted via someone who has the Herpes Simplex Virus and if they don't have it and you didn't have it before, then only one deuction can be made.
When I first read about the glory hole, my initial thought was, this sounds like fun, I might give it a go, however 'big head' started rationalizing and for me, the risk far outweighs the gain.
Happy Punting