This is a very interesting question and touches on something that scares the hell out of me.
In general, I think that gender does affect intertype relations, but only in a minor sense. Perhaps 10% is due to gender, and 90% is ITR. However, as @
Rebelondeck pointed out, when sexual attraction is present, it tends to overwhelm other influences.
In particular, I’ve been sexually attracted to types that are really incompatible with me. The incompatibility didn’t, unfortunately, stop me from having a relationship with them.
The thing that scares me is the fact that, despite knowing a number of duals who are interesting and attractive, I don’t feel the “brakes off, full speed ahead” lust thing with them that I feel with some less suitable types. The duals I have met are warm, comfortable, and good companions, but are not objects of lust.
I think that my problem stems from seeing my duals as “too human” to be objectified.
This probably says a lot of bad things about me, but there you are.