For starters, I see I need to make an "ask me anything" that is not specific to dick quality because this question has nothing to do with that. Second, if your mouth is on my asshole how could i possibly squirt in it at the same time. Gotta pick a hole man.

So this is a really specific question that actually has me really thinking because when you say big tip I'm assuming you mean like a big cap and a slightly thinner shaft but you also might mean like a large tip in width wise in comparison to the shaft which would be kind of odd/ choadish.  (not hating, just facts). I'm not entirely sure of ratio is the best way to measure this but ideally you'd have a thicker girth and I would prefer not an overly large tip either the same thickness to where it tapers down to the tip or slightly larger but not like a huge mushroom cap type deal .

I have not had a black cock however, The largest dick I've ever seen was indeed attached to my FINE ASS friend (who is black) and it was terrifying lol. there's no way that would have worked out.