I think it takes a lot more than an SSRI to permanently damage sexuality.

When I worked in psych we had several men court-ordered to get hormone shots every month to effectively chemically castrate them because they were serious sexual predators. It took quite a bit of depo-provera to do the job and even then some of them would have it start to wear off before the next shot. If an SSRI would have done it everyone would have been happier (you can imagine how happy those men were to get their monthly injections).