Long time lurker here, chiming in with a throwaway account.
I have a regular BB girl. Honestly I never would have expected it nor did I think I would ever partake. Obviously any reasonable person would not share the girl so I will not be disclosing much. To anyone reading this, take what I say as a grain of salt as we all should with these threads, but this was my legit experience.
First time it happened I was so worked up and just asked, and she said okay. What? Just like that? Immediately rolled the dome off and asked again to make sure I did not hear wrong. Got the confirmation and I did not hesitate. Post nut clarity was so real afterwards. I started thinking, what if she's trying to trap me and get pregnant? What if I catch something? As of today I still see her on a regular basis, each time is still bbfs, and I still have not contracted anything. Now I'm not naive so I can't help shake off the feeling that others are getting it too, but at the same time, I'm still clean so maybe not? Who knows. Either way this was my experience that I wanted to share and with it I now truly believe in the whole "YMMV".
Goodluck boys.
BBFS is not some rare unicorn, the reality is, it happens.
You might find yourself in one of the following situations and be the recipient of bbfs.
1- You find a girl who is new and from a culture that's more subservient and you tell her during her first few days at holistic spa that you don't wear condoms. Sometimes they just go along with it thinking there isn't an option. Later on, with more experience they realize they can just say no. Personally I find this sleezy but I've known many girls this has happened to in there intro to this business.
2- You start to see a girl at a semi who is pretty normal, is known to have a fairly low service level. (hj maybe topless) You see this girl often and spend time getting to know her showing your deep interest.
Over time, she falls for you at the spa. You get her number, you go out, next thing you know you when your passionately kissing before sex, neither of you hesitate when you just slip it in.
If you are a decent conversationalist this is your best, most rewarding and safest option. It is however the only option where most definitely the mpa has developed real feelings for you. So tread cautiously.
3- You frequent sex shops where some girls partake in party favors, these same girls are more likely due to there dependancy on substances to push sexual boundaries. These are also the girls you are most likely to contract an sti from.
4- You visit a holistic spa or in-call agency where "special services" or just openly advertised bbfs takes place. These shops usually have girls whose previous experiences included shooting hardcore pornography in foreign countries. Most of them are on pills to completely stop or control there menstrual cycle (so they can work for months continuously without days off) and utilize anti HIV medications as preventative measures.
I will leave you with this:
Often, when you get to the point of bbfs, you either know the girl is a drug addict, or you feel your special. That you are different and unique to her. The reality is, you will most likely never know, the fact is as a customer she was willing to do bbfs with you. Also, you will never truly take her seriously anyway, she will always be a fantasy for you. Dating would never work out, she was a sex worker, she was willing to go to extremes with you, never would you trust that long term. And always you would wonder, how many others?
This is not a judgment or condemnation of what mpas do, this is just the reality of imagining this same girl as a real tangible part of your life, interacting with your friends and family, having children with etc.
I don't have a problem with anyone partaking in bbfs in the right situations with mpas, just make sure to get tested regularly for the good of the whole community. And if you are doing bbfs with one girl, don't put others at risk if your not sure about your sti status.