The point is quite clear “because they use birth control”.
Your rational is quite silly that you know what only those 2 people know.....You must be pulling our leg to get some nasty reply from someone....you were asked intelligent questions by metmom and I also want to know HOW you know these things...LOL
And the question was... *How do you know WHY they’re childless?*
Seems to me that there is a lot of judgment going on unless you somehow know that to be a fact. Either you asked them or they volunteered the information to you. You can’t tell just by looking.
And considering that some people are childless because of infertility, it’d be a pretty crass thing to go up and ask them.