I'm a straight male but I often write as a female and have sold some gay-themed pieces as well. I'm not personally familiar with all the fetish scenes (hell, there's only so much time in the day) but I am very good at researching situations without being directly involved with them (the voyeur in me!). I am also able to incorporate humor into my writing.
I've been a professional, freelance writer for over 20 years. My work has appeared in dozens of magazines and websites. I'm also an established erotica writer of both fiction and non.
Without more information (word count, style, specific subjects) it is difficult to bid. But I will work with you.