Love is found, and dismissed, very casually and almost according to the preferences of the particular day.
I could hardly find anyone who wasn't in a relationship and who wasn't engaged in some serious PDA all over the place, complete with holding hands, wearing matching clothes, constantly uploading a super-couple-y profile picture on Facebook and so on.
In America, guys get to be cool players who are allowed to switch between different pretty girl-toys who will simply obey their preferences.
From my experience at an American university, I understand that dating in the U. is a lot more spontaneous and relies a lot less on checking every detail about the other person.
Be yourself British gentlemen are stereotyped as having polite behavior and good manners.