Intimacy is a wonderful thing. It is not just about sex, but about physical and emotional closeness between you and your partner. Some men are uncomfortable having sex while their partners are pregnant, but as long as the doctor says it is safe (and usually it is), by all means, enjoy it. These are the last months you will have a chance to be intimate without worrying about another little being in your life, so take advantage of it!
Once your baby is born you will most likely find yourselves too tired and too focused on other things (like Baby!) to make time for sex. But it is incredibly important to remember that intimacy between you and your partner is vital to the health and success of your relationship. While sex certainly can be a form of intimacy, your relationship doesn't always have to include sex. Sometimes intimacy can be cuddling together, talking with each other, sharing your time and experiences, reading together, or indulging in a late morning in bed while doing crosswords or Sudoku together.
The key is to practice and be creative in your intimacy now so when things get chaotic after your baby is born, you'll already know tried-and-true ways to bring you and your partner together, despite all that is going on around you both.