Can you calculate a person's sexual orientation with tarot cards?

Of course. But you have to understand. A simple array, the holy triangle will do.

First of all, this is a privacy issue. You can't tell others about divination without their permission or knowledge. There is nothing wrong with divining yourself and confirming your sexual orientation.

Secondly, divination is not fortune telling. You asked about sexual orientation, which is not constructive in itself.