I have found that the rectal thermometer is perfect for massaging my prostate to intensify an orgasm. The small, round tip can be positioned just right, gently touching the prostate from inside the rectum. Sliding in and out or rotating the thermometer can cause an orgasm all by itself or as part of manual stimulation. I have only used this technique solo. I think it would be doubly stimulating with a partner. Have any of you had this experience with a partner?
A note of caution: be very gentle with the thermometer. It only take a little pressure to stimulate the prostate.