Sourcesexual is a sexuality exclusive to introjects in plural systems, whose sexual orientation does not align with their source's, yet they still feel a connection to their source's sexual orientation. Someone who is sourcesexual may feel as if they are/are supposed to have that orientation, despite not identifying/knowing they don't fully identify as such.
For example, an introject whose source is normally heterosexual, but is bisexual themselves, may still feel connected to being heterosexual, as if they were supposed to be it.
The romantic alternative would be sourceromantic
History
The term sourcesexual was coined by user Preshouse2006 on April 10th 2021, and was designed to be a sexuality counterpart to gendersource.
The sourcesexual flag was designed by user The Icarus System on the same day