This is a fun and polite way of saying that as a gay man you received double penetration in your asshole during a threesome. Two dicks, one ass.
#1 -- So, how was the threesome?
#2 -- Good! I got double penne pasta.
#1 -- Wow! Aren't you feeling a little loose?
#2 -- ** Head tilted, hand on chin ** YEP!
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi