It's not just that you don't feel gay anymore right after you've climaxed, it's more that you don't feel in any way sexual right after you climax.

I don't know if you're familiar with Dan Savage and his sex advice column (which you can read on-line at savagelove.com), but he addressed this very question in his column of January 22. I quote from his column: "A man's body releases the hormone prolactin when he comes. That particular hormone makes a man sleepy, it makes his boner deflate, and it temporarily renders him indifferent to and/or repulsed by sex. So something that sounded hot right before you came -- eating your own come out of the wife's pussy [or in your case, continuing to suck your guy's cock and take his load] -- is going to be much less appealing right after you come."

I hope this information is useful. And check out Savage Love.