My Friends Tickled Me In My Sleep And It Turned Me On

i was sleeping at a friend's house and i shared a bed with two other girls. i guess i fell asleep earlier and they took advantage of that. when i was sleeping on my back i felt some hands tugging on my blanket then they started lifting my shirt and tickling my tummy. i immediately got up and covered myself but they held my arms and kept tickling me. i felt embarrassed because i hate how my fat tummy was showing but it turned me on at the same time and i can't explain why. when they stopped they told me i was all red. for a moment i wished they had kept going because i felt something in my lower belly, kinda like when i'm horny