New to this site here's our interpretation of the designations we see:

Bi-curious male or female? = Yet to have an encounter or sexual experience with the same sex 1

Heteroflexible? = Already had sexual relations oral and or anal with the same sex plus male/female sexual relations.2

Bi-sexual? = Already had sexual relations oral and or anal with the same sex plus male/female sexual relations. with no hang-ups with anal 3