BP will tell you that real men play four strings.
I was a real man for a long, long time....but have decided that I am now, without any reservations at all, a fake man. I like fivers. I feel comfortable with one even if I never use a note below E. (But they do solve that "what do I do in D" problem, don't they?)
There's only one way to resolve the question, isn't there? Get yourself a fiver.
Jack