My back.

[Yamcha]

Remember to arch your back when your girlfriend is gaping you with her strap on.
That works for me. 

[SuperTed]

Deadlifts with a wide grip should do the trick.

[da_vinci]

Remember to arch your back when your girlfriend is gaping you with her strap on.
That works for me. 

The best advice so far. Will do this after a deadlift day.

[da_vinci]

Deadlifts with a wide grip should do the trick.

Have been always sceptical about them being able to develop lower lats, but wll give it a try.

[lilhawk1]

Deadlifts, revers hypers.  Until you've done them for some time, you can't really expect to have much of a back.  Especially lower back, but they add size and density to your entire back, and deadlifts will develop the traps a well.

[da_vinci]

Deadlifts, revers hypers.  Until you've done them for some time, you can't really expect to have much of a back.  Especially lower back, but they add size and density to your entire back, and deadlifts will develop the traps a well.

Damn, never saw reverse hyper machine in my life. That looks very cool.

[falco]

Can't see the pic.
Your lat development will be determined geneticaly mostly. Some exercises will help but won't do miracles. Upping the dose will also help.