User blog comment:UnderAPineapple/Pineapple Talk 7: What's Funny/@comment-5264011-20170827021622/@comment-32574574-20170827022614

If he is transgender, I would agree with you. If he is transsexual, I don't.

Transsexual people experience a gender identity that is inconsistent with, or not culturally associated with, their assigned sex, and desire to permanently transition to the gender with which they identify, usually seeking medical assistance (including hormone replacement therapy other sex reassignment therapies) to help them align their body with their identified sex or gender. - Wikipedia.com

Gender is not a social construct, and biology proves that.