I feel exactly as you do. Sperm should never be spit out. Ever. To do so is rude. The man has given you part of himself, his sperm, as a reward for a job well done. The cocksucker should graciously accept this gift.

I, too, like to hold the sperm in my mouth and swirl it around to fully savor the flavor. And I, too, like to let the man know that I am really enjoying his sperm.

Even better than swallowing is to kiss the man with his sperm still in my mouth and give part of it back to him. Then we each swallow part of his load. I also like it when a man kisses me with sperm in his mouth, either my own or another man's. It's easy to see why I call myself spermkiss.