Does it have to be penetration?
My girlfriend at the time and me, 4 of her friends and one of her friend's fairly well endowed boyfriend went on spring break together.
Third night it started with the girls taking about how big he looked when his bathing suit clung getting out of the pool earlier that day. Next thing I know his girlfriend is holding his big hard cock with two of the other girls licking his cock together. By the time my girlfriend got my hard little dick out he was laying down with his girlfriend sitting in his face with the two girls sucking his balls and cock.
That's when my girlfriend mounted me and started fucking me while her bestfriend got on my face and i ate her out. By the time I came, her bestfriend couldn't take any more of my eating her pussy and i had already eaten another girl to a few orgasms.
By the end of the night i had only fucked my girlfriend but i had eaten everyone's pussy a few times, the other guy faired better, he only gave oral to two other girls beside his girlfriend, but his cock made its way into all 5 girl's mouths and pussies and he came in my girlfriend and 2 other girls.