Most Helpful Guy
No, it wouldn't put me off at all. Kudos for losing all that weight! I am pretty sure that your skin will recover slowly, maybe not fully, but enough for it not to show. You are young, and are still well short of that stage in life when loose skin doesn't recover.
Best NOT to warn them. Better not to bling it to their attention. They will always be looking for it if you do!
Most Helpful Girl
It's fine! Do not warn him... I have recently lost 40 lbs and have the same exact issues in the same exact places. I went on a date that got a little steamy I doubt the guy noticed at all even if he did I did not receive one complaint.