Hi. Me and my girlfriend were "messing around" the other night. I ejaculated, and some of the semen landed on a towel. She went to use to the towel for herself, and touched a spot of the semen on the surface of her vagina, and then accidentally touched herself in response.
We've done some research, it hasn't been 72 hours yet since the incident, and we're wondering if we should be worried. If so, do you suggest we get Plan B or some alternative immediately?
Thanks
K