...just for a different perspective, i use a handsfree interactive setup, in bed, and always have a full sized sex doll lying next to me. Whenever i see ass, i can grab ass, and so forth. And when the machine fucks me, phantom limb syndrome or wtvr psychological effect is actually responsible, results in this mental composite of VR girl, sex machine and sex doll blurring into one, and i'm fer sure, actually fucking the girl on screen. The human brain is easily fooled, much to my delight. And repeated use (she's been there over two years now) just reinforces the effect. Great fun.
Somebody mentioned it earlier, but it absolutely bears repeating endlessly, number one tip, USE A HEAT BLANKET!! It's a transformative experience. i wrap the doll up during the day, with the blanket on low, covered with a duvet. The idea is to make sure the heat has penetrated all the way through. TPE has a large specific heat capacity, like water, it can absorb much heat, and will slowly release it during the night. She always stays warm, and interestingly, her internals are warmer than her skin, which feels more natural. And TPE becomes softer when it's warm, so she's even more jiggy jiggy.
Love it...