Or you can go for for the 'Car Doggie.
Not only does this allow ample air flow, says cofounder Claire Cavanah, an open roof also creates a bit more vertical space for seated sex positions more on those in a sec.
Oh, and if they have a giant trunk or tailgate? Assuming you're not pulling over for a car romp in broad daylight if you are, you animal! While on her knees, your partner can also play with your nipples, kiss you, and give you oral sex.