What's the sexiest thing a girl can do to turn her boyfriend on?

I replied: 

Ok I honestly don’t know, but to me.. this is how it’d go. When you and your boyfriend have that kind of 'deep talk' or 'smart talk', not just some casual easy conversations, but serious conversations. Then you guys just end up enjoying each other’s company, you hug him and kiss him on his forehead and you lay your head on his lap and let him play with or pet your hair and kiss your nose and awww OMG~~ hahaha I’m sorry I’m just blushing right now.

But it’s a hard question to answer cause people have different opinions on what’s considered sexy but to me that is. hehe