Insane anal BBC dildo makes me cum hands free

First time I manage to take my biggest toy anal and even managed to film it. Wasn't able to just ‘take it', I nearly was able to take it full on balls deep. No surprise it made me cum hands free. For reference, toy is 7,5cm (3 inches) in diameter, 24cm (9,5 inches) girth and 28cm (11 inches) insertable.