To the men out there, when receiving a BJ from your partner, do they always do it until you cum?

My (34M) gf (28F) usually gives me head a few times a week a week. Typically it will last around 5-6 min before she starts to tell me her jaw hurts, neck hurts, back hurts etc. and then she’ll stop, leaving me with a hard on where I’ll just tuck it away. I may get more throughout the day, I may not. When she has done it to completion, it generally takes me around 20ish minutes to cum from oral and sometimes upwards of 30+min if we’re having PIV. Some of my exes have told me that me lasting long made them feel some type of way, like there was something wrong with them when they couldn’t “get me off” in the amount of time they expected to

Now don’t get it twisted, this is not a post where I’m complaining about the lack of intimacy or anything lacking from our relationship as I love her and appreciate her willingness to constantly want to satisfy me. I definitely consider myself one of the lucky ones after reading some of the dead bedroom subreddit threads on here as well. However, I’m just curious if this is normal or not? What are some of your experiences getting head? I love being able to fully relax and just cum from a nice blowjob like the rest of us but I wish it happen more than a few times a year.

UPDATE I’ve been seeing it being asked a lot in the comments. Yes, my gf and I will have sex afterwards if the bj is given as foreplay. Yes, I do go down on her just as much. She and I have a really healthy sex life and are both HL people. I’m never intentionally left unfinished/with blue balls. She tells me she likes to give head and is very enthusiastic. She’s one of the ones that gets pleasure from being able to give pleasure. I failed to mention in the original post that I’m referring to specific times where she will surprise me or want to be playful while cooking dinner, while I’m watching the game etc and she will just put her hair in a ponytail and start going to town. Then she’ll stop due to the “X hurts.” The random bjs are the ones I’m asking the men out there about where having sex after isn’t an option at the moment