From the search page, click on your user name in the upper right. Select "profile" from the drop-down list. When that page comes up, tick the boxes called "turn off straight (or bisexual) categories." Then click "submit changes" at the bottom of the page. (This last step is important.)

I have these boxes ticked in my profile, and and my view is almost vagina-free. Occasionally a user posts straight content but doesn't tag it as such, so it will show up. When this happens, users often post messages reminding the uploader of the rules.

I hope this works for you.