Scientists say that kissing burns 6.4 calories a minute. That's why we think the Women's Hearts on Fire Underwear & Socks Gift Set might just be the perfect warmup for a two-person Valentine's Day workout. Made to be oh-so-soft, the panties put hearts on her cheeks and the comfy socks keep her toes cozy all day long. Packed in a special tin adorned with a healthy amount of kisses instead of candy, the Valentine's Kisses Underwear & Socks Set is the gift that will get both of your hearts beating a little bit faster. Who said cardio couldn't be fun? Just don't pull a hammy.