I can confirm this, since I have an older female cousin who's also into balloons, that is not scared at all of blow to popping a Q24 or any Tuf-Tex balloon and she doesn't wear any ear plugs. In fact, she's not scared of any popping method.
I'm still rather new to balloons, so fearless, not there yet. Something about an object that big going off underneath. I've had a few accidentals which seem to kill my mood. I do find over inflation and the risk of bursting sends me though.
In my experience no. We were all a timid bunch. It was left to the boys in the family. My big brother would burst birthday balloons with his scissors as close to our faces as he could. Personally, I'd rather climb inside one than hear them go off. Getting purposely inflated inside one near its limits would be more daring I think.
I am a lot more relaxed than when I was younger but still very phobic about B2P. But this doesn't apply to other types of noises like guns. It is more to do with controlling when the noise is going to happen and with B2P it can happen at any time.