Yikes, I've been so busy I haven't thought much about Valentine's Day this year. That's terrible for a person that is a sappy romantic at heart.
I have found that everything in your life can be done in a green way, even Valentine's Day (and your sex life). Eco friendly gifts include organic chocolates, organic flowers, fair trade coffees and teas, organic cotton, hemp, and peace silk lingerie (which is really hard to find by the way). Enamore in the UK has some really sexy sustainable lingerie but I haven't found much here in the US. Maybe by next Valentine's Day I'll be ready to be totally green.