My girlfriend and I have been arguing about this for a while now. My coworker's girlfriend, who is studying to be a beautician, has offered to help me with finding the right makeup to feminize my face. My gf doesn't want her to do that since that'd be another woman putting her hands on my face. I brought up that her (my gf) friends help her with makeup and such so why isn't it okay if one of my female friends helps me. She said it's because "you're not a girl yet". She even had her friends over to help me with my face but they had to do it by putting it on her face, and then she'd "try her best" to replicate it on my face. See, the thing is that I learn best when someone shows me and then lets me try it. The way my gf wants me to do it will take me longer to learn, and I don't do well with tutorial videos. And when I protest about it, she always takes it personally. "I guess you don't think i'm good enough." and stuff like that! I'm really getting sick of this!
What do I say to her??