Why do some women freak out when they encounter HD?

I had been going out with this female for a while and things began progressing and we wound up at her place one night. She told me to get comfortable and we start making out but when we go to her bedroom she freaks out and says OMG sweet Jesus and then says that’s not going near her. After that night she stopped texting me. For full disclosure, I’m 12.5” and about 2-3” thick. Any thoughts?