I imagine this may be hard to do without a lot of different sized toys to try. Texture and shape would also influence things. Not to mention things may change throughout the monthly cycle.
I'd be interested if anyone has ever done something semi scientific in terms of dildo size preference testing.
Penis size preference very often is dependent on who it is attached to and what else they do while pleasuring a woman. That would be even more difficult to test.
I'd be interested if anyone has ever done something semi scientific in terms of dildo size preference testing.
Penis size preference very often is dependent on who it is attached to and what else they do while pleasuring a woman. That would be even more difficult to test.