A couple of times, it's kinda funny. You do it repeatedly and it'll start to feel more weird than funny; more like an obsession. But you already draw plenty of other stuff that I personally find bizarre, so it's not like one more thing is going to make a difference. If it's what you want to draw, go ahead. Clearly, a small number of people seem to find that sort of thing sexy. You can add it to the list of fetishes I don't get, but as far as fetishes go, it seems like a fairly harmless one at least.