Your cum tastes like dick? Well, then I can solve your all your problems. Get to know they guy who's cum tastes like butterscotch, pay him between $10-30 a week and get him to cum in a cup for you, for however long it takes you to get your girlfriend to shut up and move on.
He's what you do, she's giving you "head" you about to come, fart as loud as possible. This'll work better if your lying down for the recently released gas will flow downward into her vicinity, She'll be disgusted and she'll probably move away to either punch you in the balls or bite you there, it's actually better if she tries to bite as she'll keep her eyes on your nut sack and not anywhere else. As she pulls away make your usual orgasm noise, groan, moan, whatever. Having already opened the cup minutes before in one fell swoop as shes pulling away throw the cup full of cold cum in her face. Then you can apologise for the fart, as she's licking her lips with the tasty goodness that is butterscotch semen.
By now she would have forgiven you because your cum tastes so good and she'll happily fall asleep. You can the proceed to "finish yourself off" in the bathroom.
Problem solved! :thumbsup:
P.S. About the pubic hair, trim them down or shave them completely. You'll be fine.