Anal lubricant?

you are not too young to buy KY jelly. Its not regulated at all and in any drug store. Ask for it at the pharmacy...say something like, "My grandma sent me in here to get KY jelly. she uses it for her suppositories." then roll your eyes and smile.
EVERYONE has an odd grandma. AND ky jelly is used to insert suppositories...

Definitely Vaseline! It works perfectly and a lot of people have it around the house, if not it's ever so cheap to get from pretty much any shop but if not try looking in skin care shops.

Liquid soap or even conditioner will work.

You can try using Vaseline or you can buy K-Y gel. It is usually on the counter in Drug department in Walmart where they sale condoms. Pay for it through the self paying station and nobody will say anything.

there is No age limit to buy Lube- it is available to Anyone in the same aisle as female products near the Condoms

Lube is available at All drug and grocery stores

Vaseline will work.

--->> Tips---> https://tr.im/werwer

Plant oils and spit are the best things I can think of