Once every other sexual. Twice per sexual would be "semisexual".

This is your brain on sexual.

Sexual twice, then never again.

And there is bye sexual. You never get laid.

Yes

BI-sexual, someone into Bilinear Interpolation.

Twice per sexual, since you technically can't have bisexual sex with just one partner.

Source: Am bisexual, but am also on the internet, so essentially I'm just guessing here

It means being sexual twice a month. or twice a week.

My brain is trying to find out what this actually means but there is literally zero actual meaning.