I love guns and have lots of them. If I had a partner who wanted to play with guns, I'de surely let her under the condition that both of us verify the weapon was unloaded. Guns are very safe and there is no danger so long as you don't do anything stupid. Like wave them out in public or play with a loaded one.

Me personally, it wouldn't make me feel any more powerful. I'm a soldier, and I'm so used to guns, that using a gun is like writing or riding a bike. So, to have one ... is just another natural feeling for me. As far as other people, a lot of people I know are very frightened by them, especially some of the meaner looking assault rifles.

Basically, I think you should tell your partner about your gun fetish, and see where it goes. The worst they could say is no. (Also, don't do anything illegal)