U.S. actress Maggie Gyllenhaal arrives for the European Premiere of The Dark Knight in Leicester Square in central London July 21, 2008. [Agencies]

Maggie Gyllenhaal says being by the ocean makes her felt sexy.

The 'Dark Knight' actress - who has a 20-month-old daughter Ramona with fiance Peter Sarsgaard - admits there is something about the "wildness" of the sea that has a profound effect on her.

She said: "Being around water, and in water, makes you feel so good. The ocean is really sexy, and the wilder and wavier the better!" Maggie, 30, also claims every man should spoil their lover with expensive gifts.

She added: "I think it's the job of your lover to adorn you.

My boyfriend gives me jewellery and it always looks great. Think about it - this person adores you. This is how he wants to see you.

"This is what he wants to see on your neck, your hand, your ear. A man sometimes can see what you can't. What is unconsciously beautiful or sexy about you if often the most compelling."