36FF natural breasts - what does that even mean?

Cassandra has 36FF natural breasts. Natural. 36. FF. What does that even mean? It means we play with them - a lot. First we weigh them, ten pounds of breasts! Then out comes the Goat Milker modified into a predicament machine where her nipples are pulled and sucked every time she moves the vibrator toward her clit. This gives her a challengingly little workout with a big orgasm pay off.

The Trespasser in doggie shows off Cassandra's curvy thin waist and the size of her tits as she again uses the suction of the machine on her nipples while she gets fucked from behind.