Usually 15 mins. I say 15 max but I’m not going to kick a guy out if he needed 20.I wasn't familiar with a BnG - I assume it means Blow then Go. Seems a lot of effort for such a short interval of pleasure. It would make more sense to me if it was a delivery service.
As a person that has control over his grand finale - this offering has the same danger as a guarantee 100% orgasm - if there isn't a time limit, I could end up as your new roommate. What is the time limit ?
Next interval is the standard 30/45/60 mins. I only go up to 2 hrs.
Now that I am basically semi-retired I would call it, I don’t have the desire for longer engagements. That seems like more work to me. LOL.