Does lyrica also desensitize your penis, having trouble I never had before?

For me, I found that the entire range of medications that alter the brain also alters sexuality, and more often than not, in a negative way. Lyrica works by decreasing the rate at which the nerves fire, causing for a reduction in seizures as well as nerve related pain. If there's fewer nerves communicating, it wouldn't be much of a stretch to say that it would also affect your response to sex. In addition to the decrease in nerve activity, that medication can cause for you to become easily tired (when I took that med, it was one of the worst offenders). Something as simple as being tired and lethargic will also play a role in the whole response to sex. This is a side effect that you really should discuss with your doctor as there may be alternative options for you to try in order to fix this issue. Having a healthy sexual relationship with your spouse or partner is an important detail to day to day health, bonding with that person, and really isn't something to take very lightly. Best of luck to you!
Sincerely,
Jeff K