Armpits are definitely my most ticklish spot, and my favorite place to tickle as well. Anyone else on here most ticklish on your armpits and or your favorite place to tickle?
Armpits are so tough to get to, I consider them golden targets of opportunity, and a great way to show affection/adoration (when tickling is done with the tongue and lips).
My favorite thing to do when my girl displays self consciousness about being sweaty, or having sweat marks on her armpits, is to pin her down, and worship/lickle her armpits. I think it boosts her confidence and makes her feel sexy <3