Is cum play hygienic?

I have a thing for cum play with partners where I first keep semen in my mouth after he ejaculate and then let semen/spit loosen out of the mouth on to the penis and the groin and the stomach. Then I lick all clean and then let if flow back out again. I do this multiple times.

It's the sticky messy state that turns me on.

However, my most recent partner stopped me in the middle because he was worried for my hygiene.

Is this risky of my hygiene or health? Is there a safe way to do this?