Your story reminded me of an encounter last month in MK Hing Hing.
Perfect body & tits looked decent size, had a face & hair I like so went straight into the room.
Undressing and shower were uneventful. During BBBJ I was thinking how long I could last for the main event.
Then as I positioned her for missionary I noticed 'her' patch of vertically oval missing hair where my schlong would exactly have been and a small brown dot at the center, slightly lower. (color is like darker lips on lighter colored skin)
My ladyboy alarm went into overdrive and from the largest erection, I've had since 17yo to smallest in literally 4 seconds.
I dived straight for my phone and said GF called.... had to go.... 's'he asked me a few times if she did anything wrong and that I can't leave without cumming.
I immediately paid her plus a 50 tip to put her concerns to rest... just not mine.
Said I'll come back later in the week.
After that close encounter, I went for 2 full weeks without an erection. Still shaken by the events I haven't been anywhere near that building ever since.