I’m a bit of an exhibitionist and love to show off, and love doing stuff outdoors with a little thrill of the risk of being caught (although I wouldn’t want to expose others to sex/nudity without their consent). A few years ago my then gf (now ex) Emily and I (early/mid 20s) were canoeing down a river, enjoying nature and some quiet privacy. The water was moving really slowly so we had to paddle to get anywhere fast, and so we kept taking breaks to chat and relax, and for me to reach forward and play with her butt from behind, or occasionally go for her neck and give her some kisses. She loves this and it got her in the mood as I kept teasing her.