Sexing Male mystery snail

[Teakwood]

Today my male yellow mystery snail presented the perfect opportunity to take a picture for helping others identify the sex of there snails, thought I would share. Unless I am completely clueless, but i think i got this right. The hollow tube on the left is the 'male organ' and in the pic with the long distended tube on the right is for air.

 

[Mumma.of.two]

http://www.applesnail.net/content/anatomy/reproduction.php
This explains in more detail. The males have a sheath to cover their sexual organ.
Here is the diagram from the site above.