[sexcision]

I think the difficulties of achieving orgasm thru blow job is the consistency of the pacing, the strength of grip and also the length of stroke. Of which I think consistency and length is upmost important.
As y mentioned, a few time you are reaching orgasm but failed to maybe due to her aching mouth and thus breaking the rythem and resetting the whole feel?

I myself only came once with bj. My wife dun like to give bj and that only 1 time, was when she was pregnant and she wanted to avoid pentration but is feel bad at depriving me of sex. I literally have to mouth fuck here for 15 minutes on and off to finally CIM (achievement unlocked). Before that she did tried to blow me at her pace but I simply cannot have that feel due to the above reasons.