That the brain is the biggest erogenous zone. And even though interactive erotic software is the wave of the future, one hundred percent electronic! the Dude still jerks off manually.
So I reckon you have 9/10 because that is Seda.
Here's a clip from that scene.
http://enter.private.com/signup/signup.php?nats=sponsor_freeones_com.6.2.6.0.542.0.0.0&idScene=1518
Barbara Voice and Seda were the toughest to ID.