M&M's has a limited-edition White Cheesecake flavor just for Valentine's Day.
Released in earlier this month, is made with white chocolate and cheesecake flavoring. The actual M&M's are pink, white, yellow and cute.
The downside here is that you can only get White Cheesecake M&M's at Walmart. So, if you're around go grab them while they last... order them online for around $3.