1) The fear that she might get pregnant is always there, but its exciting at the same time.
2) The thrill of another mans sperm swimming around deep inside her pussy just seems so very kinky.
Its great for you both afterwards, when you're walking around town, or when we visit her parents the next day and knowing she has a little bit of 2+ men's seed inside her pussy as they think what an innocent lovely woman she is they haven't got a clue how dirty she has been, when I know really she's actually a lovely slut lol