TS, actually this happens because the girl is not aroused. When a girl is hyped up, that part will "grow longer' to accommodate any length (remember we use this for childbirth), because the of the blood rush.

This is why some of us complain it hurts, too deep, hitting the uterus.
Yes, it may sound like a compliment, and it can be, but it really hurts.

This can also cause bruising internally, and it can be more painful for her to have sex for maybe a few days after, when it heals. Then she starts to feel sex doesn't feel good, and it becomes a turn off, etc etc. This leads to not wanting to be touched, licked, etc etc.


I know this doesn't explain her behaviour fully, but sometimes we girls don't wanna tell you if it doesn't feel good for us, because we want you to continue feeling good, as in to continue having sex.

Bear this in mind, it might help you gauge why she's feeling what she's feeling.

Hope this helps.