I'm thoroughly confused, what does age or gender have anything to do with the weight of opinions regarding this issue?
I am not sure if I am missing something and if the comments by OP are in good jest, but they seem out of line and bizarrely insulting.
Watermarks are a very minor deterrence...in fact more of an annoying hindrance that can be dealt with very quickly in Photoshop or similar program. If someone is going to steal your image, they will find a way. It's all part of the risk of posting on line. I am not overly concerned and no longer upload images with watermarks, if someone wants to work with a low res small image they have stolen, then have at it. Besides, isn't imitation the ultimate form of flattery?
It's all personal preference and has been discussed to death in this forum...by a good cross section of ages and genders if that is of import.