when i first started giving my bf blowjobs, i could last for a half an hour easily. now after about 5 min my jaw hurts along with my neck. this causes me to stop, use my hand, then begin again with my mouth. is there anything i can do to stop this fatigue?

The technique you're currently using sounds just fine to me!

More to the point... it sounds like "something" has changed... the position you're using, maybe?

Of course I can't resist pointing out that exercise builds strength.

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Enjoy the journey, not just the destination!

I agree with Wally that a positional change might be in order. Sometimes my wife and I will lay on our sides while she gives me a BJ. I love this position b/c I can gently thrust in and out if she's tired. It also prolongs the experience! We've also found that she tires less if she lay her head on my stomach and gently blows me. Hope this helps.

Nubian.

I find that I tire less if we're in a 69 position. Maybe it's because
I'm distracted (G) and I rest my head on his thigh and cover his
thighs with kisses and love bites.

It works for us !!!!!