I love icons like that, lol. I haven't had many lovers, and I've never slept with someone I didn't know well and care about, but now that I'm older I can appreciate the idea of a mature romp in the hay with a willing partner just for sex. As long as no one gets their feelings hurt. That's why this Tonks/Lupin arrangement is fine with me - they both know what they are in for. It's Snape - so deluded and out of his friggin' mind with obsession - who is set to get so hurt. And you're right, Lupin's little 'disclaimer' is very selfish. He shouldn't have sex with Severus knowing how he feels about him.