Steve
After the events of Civil War.
Bucky
When you're 34.
Tony
Directly after you get married.
Thor
After you get married.
Sam
You don't necessarily want to rush it, so you just wait for the perfect timing.
Clint
When you're 27.
Peter {Starlord}
After the events of GotG Vol.2
T'Challa
Before the events of infinity war.
Peter
When you're 24.
Loki
After a while...
Pietro
Before age of Ultron.
