Cuz ya got high Cuz ya got hiiiiiiigh! Da da dut dut da dee da daaaa!

I'm so happy for you! You're absolutely doing it the right way!

Also 3 months is not nearly enough time to have any deeply meaningful engagement with the places they will visit. I spent 18 months nomading around the world (longest continuous stay in one place was 1 month. Many places for just a few days) and my biggest regret was not constraining down to just a few places for longer periods of time. Thankfully I'm young(ish) and can go back to places that made a good impression to get to know them better. I suspect these ladies will end their trip wishing they could have more time and regretting not traveling more when they were young.

That assumes your clothes shed lint at the same amount. But that's highly unlikely.

Lots of folks have the right answers for old planes and plenty of folks have noted that newer planes are mostly switching to standard 3.5mm plugs. One thing nobody has mentioned is that new planes will sometimes have 2 prong plugs in first and business class for long distance international flights. The reason for this is that in first and business class, the seats often come with noise cancelling headphones and the second prong is used to power te noise cancelling circuitry. Typically on these newer 2 prong plugs, the audio prong is still a standard 3.5mm so you can use any headphones if you choose not to use the provided ones.

You might want to use a hairdryer to warm the wood and open the pores up more. That can help even things out where you might have tighter grain that isn't absorbing oil as much as other spots.