You're doing it wrong:

“I date women and trans men” is the definition of cissexism. It’s basing your frame for sexuality on the gender coercively assigned to a person by their doctor at birth, not on that person’s actual identity. In this case, we’re talking about folks who were assigned female. Of course, “women” means cis women—trans women totally drop off the map.... It’s incredibly undermining to frame sexuality in a way that lumps [trans] men in with all female assigned folks instead of with cis men. It’s a failure, in the realm of sexuality, to recognize that trans men’s male identities are just as legitimate as cis men’s. If you’re going to base sexuality on gender, better base it on people’s actual genders.

I get why a lot of female assigned folks exist in this frame for reasons that aren’t overtly about undermining trans identities. There’s a ton of gender based trauma out there, and I understand that folks associate this with cis men, and not with trans men. But that’s not a reality-based approach to gender. A lot of that trauma gets easily linked to genitals, but this isn’t about bodies, it’s about patriarchy. I think this sexuality frame is a big part of why so many trans men get away with (and are sometimes even encouraged to practice) unchecked misogyny and male privilege (remember, power is complicated. You can experience both male privilege and cissexist oppression). Real talk: being trans doesn’t prevent you from perpetrating hurt and violence in the realm of sexuality.

My trans brothers deserve better than sex in a frame that undermines their identities. This doesn’t mean queer cis women and gender non-conforming female assigned folks can’t fuck trans men, but then they owe it to these guys to reframe their sexuality in a way that’s not undermining – to recognize that they sleep with men, and to question why they’re OK with sleeping with trans men and not cis men. I just don’t think it’s OK to process your sexual trauma in a delegitimizing way through the bodies of folks who’ve often faced tons of trauma at the intersection of gender and sexuality.