Stupid trick

One of the guys I see loves my bjs. i think most guys do, but he really likes them. Yesterday he asked if I could try to blow bubbles with the cum. I had never done that before, so i thought i'd try. I did it, and he thought it was awesome. have any of you girls ever tried this? It wasn't a big deal, and I don't know why he cared so much. If any guy can clue me in on this I would lvoe you for it. He couldn't explain it.