My technique can work nicely...

Scenerio #1

Me and my girlfriend, are on the couch together, hands are wandering, legs are moving, and temperatures are rising. I'll get all up close to her ear and gently whisper, "I want to summon my masticore."

Usually, everything comes to a complete screeching halt.

Scenerio #2

I just get out the shower, and my girlfriend will be waiting anxiously in bed for me, wearing very little. I smile at her and drop my towel, get real close to her face so our lips are almost touching, and tell her, " My foil diabolic tutor should be in the mail today."

The last and final scenerio, #3

I'll blind fold my girlfriend, and tell her I'm taking her to one of my favorite places. I help her into the car and drive her to the location. I carefully peel off her blind fold to reveal a large room full of out of shape, unshaven, pimply gamers all playing magic. "Arent you excited babe? You get to see what I do on friday nights instead of spend time with you."

If these ever fail you, you can always wear one of those ever cool tee shirts with a giant print of a red dragon on both sides. Although the magic lingo can work, it usually takes a while for it to register in they're minds what you are saying...