Having Straight Friends

All of my friends are straight. It's mostly by accident, but some design as well. I have two gay friends, but no Lesbian friends. There is mutual respect between my female friends and I; I know and accept their heterosexuality and they know and accept my homosexuality. However, I noticed something interesting with my friend who I will call Theatre Geek. We were at work together over the weekend and I was chatting with my BFF via Facebook Messenger. BFF shared a photo with me of what happens when you use cheap chocolate to make chocolate drop cookies rather than Hershey Kisses. The result is something that looks like cookies with chocolate nipples on top. I thought this was hilarious, so I shared with Theatre Geek. She refused to acknowledge that they looked anything like a female body part; seeing instead little blobs of shit. In fairness I saw that, too, but I am baffled as to how she couldn't see the female body part. She even made a comment about the fact that she wasn't on my team. I know this. Neither is BFF, but she had no problem pointing out the nipples. I think on some level TG is under the impression that I'm going to try to convert her or something. Never mind that I have a girlfriend that I am completely in love with and devoted to.