Where should I kiss him!?

Okay my boyfriend is so sweet and charming. He flirts with me but hes very religious and conservative. Well I want to kick it up a tad notch. Should I kiss him on the cheek or the lips or what? I dont wanna rush it too quick but I also dont wanna be a nun hahah. Lips? Cheek? Forehead? HELP PLEASE hahah i know this sounds dumb but im serious. By the way his religion is christianity and im hristian too. No judging just for detail.