Trojan surveyed 3,000 adults (across two studies), and 48 percent of those polled felt that having sex in a car was more exciting than doing the deed in:
-Someone else's bed (33 percent)
-The woods (27 percent)
-The beach or sea (23 percent)
-A hot tub (22 percent)
Check out the USA Today link for more interesting sex survey results from Trojan, and don't forget that parking brake...