Thought i should leave a reply here. Yes, We don't allow content which aren't suitable for family audience. But that doesn't mean you can't even make a post with the word bikini in it.
First let me explain what does vulgar mean. I ain't a English scholar but from what I know, vulgar usually refers to explicit, derogatory, offensive reference - may be a comment, image, video, or action - most likely towards the opposite s#x.
Now, Bikini isn't vulgar. It's our "traditional Indian mentality" which gets confused between sensuous and vulgarity. A women can be sensuous in a bikini but vulgar in a saree. It all depends how they carry the outfit and their attitude. I believe it's because of the conservative setup of our family and education. And that should mandatorily change.
Hopefully it changes in future so that the women actually get freedom from us (men). It's their body, and they know what suits them better. If we think bikini is vulgar, the problem lies in our eyes not their outfit. Change the way you look at them.
It's very appropriate to recall this line today, "The world looks the way, you look at it" - said by none other than today's birthday baby, Lord Sri Krishna in Bhagavad Gita