If you have 2 male cats, what's your experience?

Curious about people's experiences having 2 male cats and how they relate to each other?

I adopted a male cat, and then wanted to adopt a female as I thought they might get along better. Long story short, that tiny "female" turned out to definitely not be female and is now a huge big boy.

They like to wrestle sometimes, but they go through phases where they seem totally uninterested in each other. One of them occasionally tries to groom the other, and the other rejects it probably 75% of the time.

Anyways, share your experiences! I'm curious.