i like tattoos to a point for example a meaningful tattoo that represents something important to you not just the word "Dick" plastered across your forehead, and also id have it in a place it could be covered by clothing like a shoulder because you may decide later you dont like it and also for people that have offensive or valgaure tattoos i just think "you know one day you'll be old and youll need help to wipe your own ass and youll be stuck looking like a faded painting
as for body mods it really depends in my opinion anything that so extreme it cant be undone is to much... like one guy i saw got a whole put in his leg so you can see threw it and he put a spike on the inside... i did think it looks really really cool but same thing it cant be undone so :/
and piercings i like ear piercings that's it... not genitalia piercings yea... that shit can cause serious health concerns, same with nipple piercings if those piercings get infected... my god you are in trouble...