There could be something intriguing or even thrilling about how a certain line is crossed, or a personal boundary is pushed. If you're single, and this is done in the name of flirtatious fun, then you might be able to leave it at that. But if you're attached, then you may need to send a clear message to somebody who has got the wrong idea. You're sexy, you know it, and so too does someone else. But a line must exist for a good reason.