Discover your hips, wind your waist white boy.

[straycat]

I've seen some men, online, moving their hips pretty successfully but we called it shagging

No - shag doesn't involve much hip action at all. You're probably thinking of something else...

[ducasi]

Never say never

My! They're a bit bouncy, aren't they?!

[EricD]

First of all, shorts should NEVER be worn dancing in my opinion

Not just your opinion - there's a whole thread Are shorts ever acceptable.

I found a nice illustration "Scheiße - it's a Swing Party, not a Swingers' Party - Let's dance !" (can I say 'Scheiße' on here ?) The whole playlist is mostly worth watching just for fun - HopSpot Cologne, IMO (maybe skip the mostly-German ones using the thumbnails to the right ?).

On the topic of wiggling, I notice that men and ladies are different. (Wow!)
Men tend to wiggle in 'C' shapes - )()()()( 000, but ladies tend to wiggle in 'S' shapes SZSZSZSZ 888 with a stationary navel. This can make leading synchronised footwork difficult, especially if arm-leading, rather than body-leading. It tends to have the opposite effect to the intended one.