I found this out last November, and I'm not sure if it cleared by now or not.
I read that during sex, estrogen
level in women's body doubles and
this results in various health benefits (softer skin, prevents heart disease etc).
But I also know that high estrogen level contributes to persistent HPV and also many hormone-related cancers including cervical cancer. I might be worrying for nothing, this connection between frequent estrogen surge and hormone-related cancers seems to make sense.