... she laughs at all your crap jokes, even the really really bad ones.
Could be trying to get something from you, like marriage for your loots and a baby.
... She sucks your cock
Could be horny and drunk.
... she slaps you in the face on the first date.
Could be an Alien from Mars wanting to get in bed with you and eat your brains, and slapped you to loosen them for later.