Well, tattoos are actually incredibly bad for your skin, and I don't think they're that particularly attractive either. I don't plan on ever getting any tattoos, and it doesn't help that they're permanent.
I've just got my ear lobes pierced once and that's all I'm getting. Seriously, do people really think metal stuck in their skin looks good? It's one thing if it's only your ear a few times but anything else is just... ugh.
If getting a certain piercing or getting a tattoo is painful, then why go to the trouble? Just don't do it.
Different people have different ideas on what is beautiful. For some people it's bleach blonde hair and breast implants, for some it's bodybuilding and fake tans, for some it's applying a lot of make-up, for some it's skinny, for some it's curves, for some it's beards and chest hair, for some it's clean shaven/waxed... and for some it's piercings and tattoos.
I know some people think hair in all colours of the rainbow is unattractive, while I find it gorgeous (and have dyed my hair blue, green, pink, purple, red, black...). I know some people think tattoos and piercings are unattractive, for me it really depends on what kind of tattoos and piercings and how they fit that person's face, body and personality. Anything from small tattoos to treating the body as a canvas can be beautiful, it just really depends on how it's done, and what kind of person has had it done. And anything from pierced ears to complete pin cushin can be beautiful.
And some things we do to ourselves in the name of beauty is painful, but we find it worthwhile because we like the end result. This isn't just limited to piercings and tattoos, but also waxing, tweezing, and a bunch of other things. But the important thing is that we choose it. We don't have to do any of it if we don't want. If you don't want a tattoo, don't get one. If you're unsure about getting one, wait until you are sure, and even take a lot of time to decide the motive, because it's permanent. If you don't want a piercing, don't get one.