A cucumber

Same. As soon as I heard of their union busting.

The show is called "How I Met Your Mother"

That's fair - I suppose there is more complexity & nuance for those situations than I initially thought about

She has kids

I understand this perspective only if someone wants to remain childfree; it's impossible to compromise on having kids or not, you either do or you don't

If it's just because he only wants his own biological kids, I'm less sympathetic