I have to say, @ds20e, it feels difficult for me to use words to describe how it feels… It kinda feels unique to me. But I’ll do my best.
Generally I would say that they part and close sporadically for me, and I guess it is similar to how some guys get random erections?
Is it more than the feeling of vulnerability when you feel your lips part?
I definitely would say I feel more vulnerable, especially if I’m not in a sexual setting, but I get turned on, and I feel my breasts become heavier, nipples erect and lips part. Is it more than that? Yeah, I think there’s a feeling of identifying the arousal which is… Odd to feel?
- I'm sure context makes a difference (sex, medical exam, etc), but how exactly?
When parting for using the toilet, laying down clothed and spreading my legs, for medical purposes, and for sex does change the feeling. I find when urinating I barely feel any difference from parting, and when I am not aroused and open my legs (say sitting frog legged) my lips don’t always part. But when I’m aroused, sometimes I feel them part even when my legs are closed and I am fully clothed… But also I’m not looking at myself at the time, so maybe I’m just imagining it?
- Do the feelings start from just opening the legs, while you may still be clothed?
Depends how much attention I’m paying to my own body at the time.