Hmm - another female swallower checking in. I have to admit that I’ve not read the entire thread, so please forgive me if someone has already mentioned this, but . . . if you can control your gag reflex and run the head all the way to the back of your tongue just as the guy ejaculates everthing just kinda runs right down your throat and you never taste a thing. I’ve found that this works a lot better for me than trying to hold it in my mouth and then swallow, and it sure seems to be pleasant for the menfolks.
I realize this won’t work for everyone, but for anyone who’s willing to try, you can train that gag reflex - I’ve never become as accomplished as a porn star, but I can “deep throat” a little bit . . . I’ve never gotten the breathing technique worked out, so I have to hold my breath to keep from feeling panicky when my nasal passages are blocked. I alternate deep strokes with short strokes to get around that, and I can’t recall any complaints . . .
I don’t get any sort of enjoyment myself from swallowing, but it doesn’t bother me, either. I do it because usually it is obviously much more enjoyable for the guy, not least because of the acceptance it implies - and most guys could hardly wait to kiss me afterwards. shrug
I also don’t get any sexual thrill myself from giving a BJ, but I absolutely love doing something that my partner enjoys so much. Talk about feeling like a wonderful and powerful human being!
However, I’m with Sapphire Wolf a bit on the hands/head thing - I don’t mind fingers through my hair, or head cuddling - but do not put your hand(s) on the back of my head and push! Not only are you destroying my rhythm and making my neck hurt, you’re also risking an unpleasant encounter with teeth. And the end of your lovely BJ, because I will stop. Pushing is rude, anyway; I’m already doing my best to give you a wonderful experience and you’re trying to force me (even gently) into giving you more? Forget it!
If I had a serious relationship going with someone who just couldn’t seem to control themselves on this matter, I think I’d try something a little drastic - like tying his hands behind his back or to a bedpost or something over his head. Problem solved, and a new experience to savor! Heck, you might never cure him of that bad habit. 
Oh, and a suggestion for anyone who wants to improve their technique: it’s best to go straight to the experts. I learned lots of interesting stuff from reading suggestions posted on the internet by gay guys! Who better to get advice from? 
Champagne, please, dear Davebear - my mouth is quite dry for some reason.