I was running on the assumption that you recognized arousal outside of martial intimacy is to be avoided. I'm really not sure if asking these questions were out of genuine interest or trying to bolster your indignation at our faith and beliefs. There are a lot of misconceptions in what you believe about Catholicism. There are a variety of NFP methods and none of them require inserting your fingers into your vagina. No science experimentation needed. I hope these questions were done out of genuine interest.

"I'm astonished that every marital sexual episode HAS to complete with ejaculation in the vagina and ONLY the vagina... or else it's sinful marital sex.

Also, no contraception! You're not even allowed to use the pullout method! The woman MUST accept semen in the vagina every single time. Maximum pregnancy risk is required.

Also, you can use NFP, but it's the woman's responsibility to shove her fingers up her vagina daily to assess her... cervical mucous? And do some kind of weird science experiment to figure out if she's ovulating. Therefore, you have about 6 days per month where you can have sex "safely" without being in your period. Also, you're not even allowed to do NFP unless you have a damn good reason. Simply not wanting to be constantly pregnant isn't a good enough reason."