I like how you prefaced that with biggest "HUMAN" cock...
well, there's too many that want to share stories of animal cocks, and that's not what I want to read about.
I think all the ones I've seen were average sized (6 to 7 inches or so). I did the usual things with them - sex, hand jobs, and oral. What do you do with them?
Biggest i had was 9" hard. Nearly split me in half. Boy could he fuck.
I had one that was 14" long. Thank God it wasn't massively thick! He did everyhing right...it felt so good I gave up my ass cherry. That was the biggest, most orgasms I've ever had with any man!
Have you continued to have anal?
ANAL SUCKS!!!!!! IT HURTS LIKE ****!!!!!!!! THE ONLY THING THAT SHOULD BE IN THE HOLE OF YOUR ASS IS P00P!!!!!!!!