DA is special in that almost all the communication here is 'thank you' (for the watch, the fave, the comment, the music and the songs we're singing, etc).
Consequently there's a lot of people saying 'your welcome'.
Which is nice: it's polite, it's considerate, but (oh, the horror) it's lacking a bloody apostrophe.
Bring back the apostrophe! Love it, nurture it; clasp it tightly between your contracted words.

'You are welcome' is you're welcome.
'Your welcome' means you possess 'a welcome'. (Want fries with that?)

Look at that proud, pulsing apostrophe in all its splendour. It's a sexy bit of punctuation, stick it in yer words and be the envy of all your friends who are still eating fries with their welcomes.