You can follow my guide I posted awhile back. I never bother even taking them onto dates or gifting them anything. I use to gift them a dildo each but got annoyed by how often they used it during sex.
Kitty is by far the hardest girl to seduce in my opinion without spending money on her because she refuses to do anything with you at the start and gets mad when you flirt with her. And she is only willing to do things in her room for the most part, and she likes to watch you and Rogue. She doesn't like actively taking part in threesomes early on. Kitty likes it when you touch her face when flirting with her. The only thing she lets you do early on is make out with her, touch her thighs , give her a massage and study with her.
Rogue is easy seduce because you're her only choice and she likes it whenever you touch her. Especially if you just flirt with her, grab her boobs, then keep fondling them till she gets mad. The honk it and let go Its a lot of freed obedience points.. She really likes giving you handjobs early on. You can ask her to give you a titjob or footjob early on and she will always offer to give you a blowjob or handjob instead. She is always willing to have a threesome.
Emma is pretty easy to seduce because she is willing to do sexual stuff with you almost right off the bat once you catch her masturbating. She is willing to give you a titjob pretty earlier on, and almost any of the "Can you take care of me" and "could I touch you" options if you are alone with her. If I recall correctly Emma likes being hugged or kissed.
Laura is pretty easy to be honest. She is just like Rogue, where she likes basically anything you do if you have talked to her a couple of times. And by the time Laura shows up you should be able to use any other girl to seduce her.
You should just download the game from this website. Saves you bandwidth and faster responses.