Search Results: not wearing undies

So my boyfriend lives with 2 other random guy housemates
2 months ago, one of the guys brought his younger sister over and told my boyfriend she's gonna be living there for a while
she's an import so she still has a Spanish accent and an intenrational student
Sometimes he brings her up like "omg she's so annoying, she uses half of my dishwasher liquid in a day"
Or
"Shes so annoying, she let all the birds out and then the big bird comes to me and i told her to take it off"
Or
"In the middle of the night, I went to go toilet and I was wearing just my undies, and she full came out with her phone lights on and she saw me, what a retard, there was lights on the side"
Etc

And then he said this:
Him - but if I was still 20 or 21, i would be still immature, i would try go for her, thinking to get into her pants
Me - so you're attracted to her?
Him - i said about my immaturity. At that age, i was still immature and would want to fuck. And she's 17 or 18. she's still a baby. Im 28. Girls that age is too immature for me. No way. The minimum i would go for is your age. Nothing below.

Why would he say that?
Is he attracted to her?

I know that you don't need to wear underwear with pantyhose because the panty is built into the hosiery, hence the name 'pantyhose'.

I wear panties because it just feels weird not wearing underwear. I'm wondering what everyone else does and if there's a reason for it, and if you do wear undies do you wear thongs or regular panties with the pantyhose

Just a fun question!