Given a travel related situation, and given a specific question about the situation, summarize the question into a title
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Question: I am going to visit Poland for some time, and I was wondering if there is ANY kind of morning-after pill available without medical prescription in Poland? 

I am in Germany right now and they made it available here without prescription but only the person who is going to use can buy it, maybe you know if there is any chance I can manage to buy it for someone else?  

The need for the pill is only in case of condom damage.


Answer: Morning-after pill availability in Poland


Question: Background

I've recently entered a relationship with a person from Canada. Part of that commitment involves visiting frequently throughout the year; this commonly involves me driving to pick her up, as opposed to flying to save cost, so she can stay with me in the US. She's planning on coming up to visit again for the entirety of the Summer (four to five months).

Extra information in case it has any impact:  


She is 20 years old.
She is a third-year university student and is committed to her program for another two years.
She has visited the US three times already this year. Twice to visit me (~five weeks in total); once to visit her friend (five days).
We've both lived in our respective countries all our lives.
I've only stayed in Canada with her for a few days at a time.

My Knowledge
Feel free to edit this information if any of it is misleading/incorrect.

The 180-day limitation mentioned in these threads [ 1 ][ 2 ] are for people who visit in one consecutive stay; not for totaling 180 days in the year.
She will be considered a resident alien of the US if she crosses the 183-day mathematical formula, as noted on this AmericanLaw website:


  A foreign national will meet the Substantial Presence Test if he or she is present in the United States for 31 days in the current year and the sum of the following:  
  
  
sum of the days present in the United States in the current year,  
one-third of the number of days present in the first preceding year,  
one sixth of the days present in the second preceding year equals or exceeds 183 days.

  
  If a Canadian meets the Substantial Presence Test but is ineligible to meet the Closer Connection Exception (i.e. since he or she is present in the United States for more than 183 days in the current year), he or she will be considered to be a resident alien of the United States. Resident aliens are taxed on worldwide income in the same manner as United States citizens.


Question

Are there any common limitations, mainly regarding stay durations or frequencies, that could make further visits throughout the year difficult or impossible?


Also, I fully understand that a visitation could be rejected for many reasons and that there's no guarantees regardless of how long of stay. I'm simply trying to avoid breaking any rules or missing any legal obligations that can come up from this international relationship. This is all foreign to me— pun was most certainly intended.


Answer: What visitation limitations can come from a Canadian visiting the US for too long in the year?


Question: We have the report of a Ghanaian-American dual citizen, recently naturalized, presenting their new USA passport at the UK border answering "yes" to the question "have you ever had any problems with immigration anywhere" and getting in some trouble (although no refusal).

We have the CBP answering in essence, the two passports of a dual citizen are completely independent.

Is it the person or is it the nationality? Is the question "have you ever had any problems with immigration anywhere" to be understood on its face value, where "you" is the biological person or is it "you as a citizen of the country your passport you are presenting to us" and they do not give this tirade every time because for the overwhelming majority of passengers the two are the same? Is your new passport a clean slate? Or do you carry the problems resulting from the heightened scrutiny of your other citizenship forever? Is it possible for a border guard to swipe my Canadian passport and be aware of the history of my Hungarian passport? How entwined are my two inner citizens :) ?

Let's restrict the question to those who have at least one citizenship in the Five Eyes countries (Australia, Canada, New Zealand, the United Kingdom and the United States) and one of the Five Eyes borders.


Answer:
Can the border guard match up the passports of a dual citizen?