Is it normal to love being dominated?

by my sexual partner, of either gender. didn't know this about myself until i was taken to a sex club in NYC by my then girlfriend. we had a small private room where she told me to undress and obey her every command without question or hesitation. when i began to object, she slapped me hard across the face. i got an instant erection, and kept it the entire time we were there - about 3 hours - while we were in all the public spaces. she had me handled by both men and women. we met another couple with a dom woman and sub man. i ate both women's pussies while the other man sucked my cock. the most thrilling night of my life up until that time.