Spark is bisexual though has a preference to males (Not of her own species.)

Male Casroons and normal female casroons are a boring lot.

MDR-27 is interested in sex, but more that it's interesting. Being a robot and all.

Zapps think it's kind of gross.

Still debating who to bring in next.

MIght eventually get to making a straight character, but I doubt I could do it convincingly.