Tumblr is great in the fact that it allows you to engage your followers by answering their questions. Guys could be looking for recommendations on a good tailor, want to know how the shoulders of a sportcoat should fit, and how to translate European sizes to American ones. That's all well and good to put out in public because it provides a service to the other people that follow you. When it gets abused is publishing questions like "Are you single?" or "I love your blog," and a snarky answer. Come on dudes, that's just tacky. Even if you're actually using social media to mack, by all means do your thing. Just keep it private.