Ha ha tan line

Tan lines can be pretty funny. My flatmate (God bless her) has had a good chuckle over these two tan lines of mine:

Sock tan
Sock tans are pretty standard, but I have a sock tan AND a Birkenstock (sandal) tan at the same time (no, I'm not wearing socks and sandals together :P). You'd think one would cancel out the other, but no, I have both.

Elbow pit tan
You know where the needle goes in when you give blood? That's what I call the elbow pit. Now that it's (practically) summer, the mornings are sunnier. I came back from my run one morning and I noticed a ring of white skin in my elbow pit. I pointed it out to my flatmate and asked her, "What on earth is this?!"

Then I realised: it's from exercising in the morning sun. Think about it: you don't extend your arms fully when you go running, so my elbow pit doesn't get any sunshine, but the rest of my arms do. Thankfully it's only really prominent after a sunny morning run (which I'm now avoiding).

I don't know why, but tan lines just crack me up.