Well we all know what Motherless is, but in case you want to play dumb and have an explanation given to you, I'm more than happy to explain.
So, Motherless is a site that defines itself as a 'moral free zone'. They allow you to upload whatever you want and also gives others the opportunity to see it. As a result of this policy, what gets put on here is mainly X-rated and a little on the extreme side. Gay porn is aplenty, so naturally, I have to recommend it to the loyal readers of My Gay Sites.
When looking for gay photographs, you're going to see that there are just shy of 100,000 pictures that fit within this niche. Material ranges from solo GIFs of cock display through to bareback interracial fucking. Pretty much any type of gay picture you can imagine, Motherless likely has it archived somewhere.