Let's face it - you need to loosen up a little! You can talk the talk at work, with peers, and especially with students of your field... but when you're in love you tend to clam up. You don't want to embarrass yourself or be rejected.
But here's the thing: you're an awesome lover. And you could be even better by using your communication skills in the heat of the moment.
Think about what you would love to hear - approving, complimentary things. So think of positive, provocative things that will get you going and rev your lover's passion - they won't expect to hear dirty talk but will probably want more, more, more!