Someone said lesbians on T begin to find men attractive because the T makes their homo female brain think like a homo male... I don't understand that tweet at all, does anyone know what they mean?

It's not impossible. Remember that there are no true labels, only facts. A woman who previously said she was a lesbian goes on testosterone and starts dating men. Why? Because she's a fetishist who chose body modification over her relationship with a woman or a better chance of attracting women. Testosterone increases sex drive. She wants to have her fetish validated and goes to the subdemographic who would famously screw anything that moves (desperate low-status straight men). Because few people want a dumpy potato with a royal flush of personality disorders in their household, these relationships are as impermanent as those of cruising gay men.