Questions & Mysteries Why doesn't goku and vegat fight 2v1 more frequently

Most of the times it is vegeta saying he doesn't need help then he loses then goku fights his turn then he barely wins is it that vegeta doesn't learn or what
why don't they just fight 2v1 and beat their opponents easier.
I haven't watched dbz since I was a child

but why won't those 2 retards fight each other more often? They keep saying how they love fighting, yet they never fight each other.
The only time vegeta fought goku was when in his 1st introduction and majjin vageta. It's stupid.