Hello, i was rubbing my penis on my gf´s buttcrack near where it ends without actually putting it in bettween the cheeks. she got on the side and i put it a bit in bettween the cheeks but where the anus is, thing is i noticed a sticky bit of pre-cum that had stickied in bettween my gfs cheeks, not actually liquid but sort of drying up, like such a small bit it didnt move. Now my gf was very moist and ive heard things about precum sliding along the buttcrack onto her vagina. Are there any real risk of pregnancy?