The couple, who renew their wedding vows each year, still drive each other wild after seven years of marriage.
"You have to marry someone who you think is really, really hot and sexy," the supermodel, 37, told reporters during a conference call to promote her Lifetime series Seriously Funny Kids, which debuts with two back-to-back episodes Feb. 1. "To me, [Seal] is the hottest man. I still look at him, and he's hot and sexy . I still feel that, and I get the butterflies in my stomach."
Klum says that aside from the nature of her career, she focuses on staying fit so her husband, 47, will continue to find her irresistible.
"We work on staying hot for the other person," says Klum. "You know, exercising, eating right, keeping the body in shape . I don't want to get out of the bed and be covering myself like, 'Ooh, don't look at my butt.' "