So, if I have a dozen friends who are going to starve if I don't feed them, or freeze if I don't shelter them, and I've only got food and roof and heat for three people... What ARE acceptable criteria for picking the lucky two friends, if not my own sexual desires?
Whatever your answer there, does it stay the same the less necessary the things I am providing are? It's a wide grey area between not-starving and having a sugar daddy, but there are many distinct transitions along the way.