Do you wear suntan lotion?

Once again, a very mundane topic by yours truly. However I was thinking about it in the shower today and wanted to know people's thoughts on suntan lotion.

I personally have been blessed with everything counterproductive in obtaining a tan. I have dark auburn hair,

I'm paler than Casper the ghost and have green eyes.

I have to wear at least factor 30+ if I want to go out, for more than 15 minutes outside in 18.C+

So my question to you is:

Do you wear suntan lotion? If so what factor & why?

If no, why not? Do you care about burning or other skin changes?

If it depends, in which circumstances would you wear it?