Gay chat rooms therefore evolved into m4m (men for men), T4T (trans for trans), bisexual chat, leather and bear, lipstick lesbian, etc. By the mid-90's, it wasn't unusual to see mm4mm groups (married men for married men) and other [even more] highly specific types of discussion groups.
Source: wiktionary
Online, t4t tends to denote an erotic orientation or practice, but in [Torrey] Peters' novella it also becomes an ethos around which a group of trans women organize themselves […]
Source: wiktionary
Likewise, a lot of people who have spewed hate over trans people seemed extremely confused at the idea that trans people could date each other - newsflash, gender and sexuality are different things and T4T (“trans for trans”) couples are fairly common in the LGBTQ+ community!
Source: wiktionary
I remember how I used to be before the contagion. Embarrassed to be seen with another trans woman, for fear that her transness would reveal my transness and we'd both get clocked. T4T is an ideal, I guess, and we fall short of it most of the time. But that's better than before. All it took was the end of the world to make that happen.
Source: wiktionary