Is it considered Haram if I involuntarily experience "al-madhi" (pre-seminal fluid) due to intrusive thoughts after seeing a naked man, and does that mean I am a homosexual?

Allah has forbidden looking at the awrah (private parts) of men, and has made it obligatory to lower the gaze and guard one's chastity. The scholars have explicitly stated the prohibition of dwelling on forbidden thoughts. The Prophet, peace and blessings be upon him, warned against the companionship of the corrupt. Therefore, whoever has committed the forbidden act of watching nude individuals and dwelling on forbidden thoughts must repent, increase in good deeds, utilize their time in what is beneficial, associate with righteous people, and frequent gatherings of scholars.