He doesn't know how to finger a girl

Needless to say make sure your hands are clean beforehand. Also clip your nails and file them, you don’t want to scratch her.

First start by making out: kiss her on the lips/neck, nibble on her ears/neck (this is a personal preference of course). Move on to the chest area: massage her breasts and stroke her nipples with your fingers, suckling usually works too. Rub her legs, stroke her things, and gently knead her butt (again this all depends on what she likes). Keep going back to kissing her lips…

Once she is turned on, massage over her pants/panties. Once you are sure that she is wet (you can feel this through her underwear) you can pull down her panties. Start by stroking her outer lips and use some of her wetness to rub her clit, gently (it is sensitive), in circular motion or side to side.

By this point she should be completely wet, and you can gently insert one finger. If there’s any resistance, if she’s not lubricated enough, or if she seems like she’s in discomfort, stop and just go back to step one until she is completely wet…

As you are fingering her, build in pace and strength, but make sure that you do not get too rough. You can then move on to more than one finger. You can rub the clit simultaneously with your thumb (this takes a little practice) or switch back and forth between fingering and rubbing the clit. See what she likes…

To find the g-spot, stick two fingers in palm up. When you’re about two inches in, make a come hither motion; you should be hitting something that feels like a little ball.

There isnt an exact science to this. Just look out for facial cues, sounds, etc to see what she likes and what she doesnt like. Every girl is different and they like different things. If she seems uncomfortable talk to her, kiss her (mouth, neck, breast, stomach etc).