Is oral sex good for building the immune system of the giver?

The human immune system in large part is just bacteria that are helpers to our bodies. We have more bacteria by 10x than cells. There's lots of bacteria..."down south"... so...

Are there any biologists or microbiologists out here that can affirm if it is good, bad or indifferent in terms of improving the health of our immune systems?
Is oral sex good for building the immune system of the giver?
BEST ARTICLE TO READ: Immune boosters: sex... and pets!:) e. g. relaxation!!! Lonliness and isolation are bad
https://www.onhealth.com/content/1/immune_system_boost

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3639487/

Sex in general is helpful... I assume good stress releiving sex, not difficult and frustrating sex.
https://www.webmd.com/sex-relationships/guide/sex-and-health#1

Prevents colds - because is releaxing
https://www.psychologytoday.com/us/blog/all-about-sex/200906/want-prevent-colds-have-sex-weekly
Is oral sex good for building the immune system of the giver?
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