I had FFS before SRS, at that time my undiagnosed bipolar was acting up, manic wise. I went on a very weird sexual trip, meeting men and women on craigslist and picking up women in bars. (Never met men in bars, even that was too crazy or I should say stupid.) I didn't tell the women, at least not on the first night, I just kept it under wraps)
I put my pic on craigslist with very provocative, enticing and clever messages. One of my posts got nearly a thousand responses. I did not reveal that I was non-cisgendered in the ads. Nor would I reveal my past in the first couple emails. (I loved the power of toying with these guys.) I also put a BDSM video on youtube and got 100,000 views and guys by the hundreds wanting to be my sex slave.
But the bottom line is, as crazy as I was, I would never think of meeting any of these guys without disclosing first. Again, I was crazy but not stupid.
Post-op, I had another manic spells dating and ->-bleeped-<-ing a lot of guys and I never disclosed to one of them and never had any problems. Luckily, I got sober and got my bi-polar addressed before I got an STD. Or something worse.
Today, I am in a monogamous Lesbian relationship and never plan on dating another man.