If it was true, genital piercings certainly wouldn't be very popular! Honestly, people (especially women) get genital piercings to increase their sexual arousal, not decrease it. Sometimes the piercing doesn't always "perform" as expected, but most of them run no risk of making you lose your ability to be sexually stimulated. However, a piercing that actually goes through the clitoris does run a small risk of this happening, since the clitoris is the central nerve system of sexual feeling. Clitoral piercings done by a skilled professional have very little risk of this happening.
Is it possible to have a genital piercing if you suffer from genital warts or herpes?
When it comes to medical conditions, it's really best to consult your doctor before getting a tattoo or piercing. Some people are reluctant to do this because their physician is against tattoos or piercings, but remember that they are paid to give professional advice, not their personal opinions. It's best to be informed first before putting yourself at some kind of unnecessary risk.
How does acne affect a tattoo? More specifically, if you get a zit under your tattoo will it screw things up?
Once a tattoo is healed, a blemish normally won't cause any damage unless it is picked and poked at enough to leave a scar. Usually the pimple will just come and go without any repercussions to your tattoo. However, it is best to have clear skin when you get a tattoo - tattooing over acne isn't going to give your tattoo the best start. During the healing process, it's unlikely you would get any pimples on the new tattoo, but if you do it's vital that you leave it alone. If you have an area of your body where you are frequently prone to severe acne, it may be best not to get a tattoo there.
My boyfriend is getting his penis skin pierced, and he is expecting me to give him head. Is the piercing going to like rip my lip or anything? What should I watch out for?
First of all, no one can make you do anything you don't want to do. If he is "expecting" this of you and you don't want to do it, tell him to go take a flying leap.
That being said, if you want to do it, it shouldn't be a problem as long as the jewelry is secure. If he's wearing a captive bead ring, make sure the bead doesn't pop out of place. If he's wearing a barbell, make sure the end balls are securely screwed on so they don't come off. The jewelry is smooth and won't catch on your lip or tongue unless they are also pierced - in which case, it may take a little practice to make sure you don't get tangled up. Just go slow, be careful and only do what you are completely comfortable with.