Being feminized by my two female friends and feeling extreme amounts of humiliation. Then being bent over and whipped on the butt and forced to moan like a girl (i'm actually really good at it making the act of doing it in front of others that much worst). The two girls would then laugh and giggle at my expense.

Also going shopping with them and having them pick out the panties before hand and holding them against my waist in public would make me feel absolutely crazy xD Maybe going in male mode but having to wear womens jeans with a ribbon in my hair would make every second feel heavy.