Everyone loves some kind of dessert. I am sure you probably have an idea of what one is your partners. Next time you get a chance either make it or purchase it as a surprise. You can even leave it for you partner with a note, when you are going to be away. Let the note say something to the effect of "Think of me every time you take a bite". Don't overdue it however we don't want to encourage overeating in any manner. If your partner is trying to diet use their favorite sweet as a reward. You could say okay I got you this delicious treat, but we have to ride 5 miles on our bikes before we can enjoy it. This scores double points as you are worried about your partners health and you want them to have their favorite treat.