Studies show women can experience orgasm without contractions using their imagination. Studies below are related to female orgasm through imagination with no physical contact.
Levin, R. J., & Wagner, G. (1987). Self‐reported central sexual arousal without vaginal arousal‐duplicity or veracity revealed by objective measurement? Journal of Sex Research, 23(4), 540–544. doi:10.1080/00224498709551390
Whipple, B., Ogden, G., & Komisaruk, B. R. (1992). Physiological correlates of imagery-induced orgasm in women. Archives of Sexual Behavior, 21, 121–133. DOI: 10.1007/BF01542589