Hey, I'm doing some research on how going on cross-sex hormones affects people's libido. I have heard that it generally (but not universally) causes FtM's libido to increase, and MtF's libido to decrease.
Most of this was anecdotal, so I would like some solid research on the subject. I found one study showing that FtM had higher sexual arousability, and MtF had lower sexual arousability, and another study concerning FtM which confirmed that they had a higher sex drive after transitioning, but I'd like as much as possible. Thank you.
Sexual desire in female-to-male transsexual persons: exploration of the role of testosterone administration.
http://www.ncbi.nlm.nih.gov/pubmed/21602316Gender differences in behaviour: activating effects of cross-sex hormones.
http://www.ncbi.nlm.nih.gov/pubmed/8532819