I read with interest the submission (and the comments which followed) about wanting to eat one's own cum. This fascinated me from a very young age and I do have a technique that works for me!
Once you've had your orgasm, you're not interested in swallowing cum any more...so the secret is...swallow it before you have the orgasm! I spend time teasing myself and getting really horny. Once nearly ready, I arrange myself with my legs in the air, leaning back on my shoulders. (This is actually a yoga position I hear, but I remember it from doing a 'back somersault' in gym in school.) Then I bring myself real close to orgasm a number of times, each time stopping to see how close I am...sooner or later you will come 'too close' and ejaculate a little (or a lot!). BUT...stop right there, enjoy the taste and excitement of ejaculating into your own mouth (and whatever fantasy you have) Then continue masturbating to full orgasm! The secret is that you ejaculate, but don't completely come.
It may sound like it's hard but it's actually quite easy...I perfected it when I was 15 or 16! And for those guys who think eating cum is only for gay guys, think again! I'm straight, but love this activity!! Now if I could only get the nerve to show this to my girlfriend!!!