Hi there,

I am female and have subbed several times....all successful. I don't even worry with inserting it...simply because I use the bottles provided with the synthetic and that would be awkward. Plus I have started using 3 oz bottles instead of 2 oz....they seem to like it better when you give them a little more than required. So I use the hand warmers...2 pairs of granny panties...a thin maxi pad and tight jeans with my shirt tucked in. You put on first pair of grannies...then the second...put the maxi in the second pair...put the bottle in the second grannies on top of the pad...But actually even better is some of the boy cut panties have a little pocket in the crotch....you can put the bottle in the pocket...and ditch the maxi and second pair of grannies....but if it is too tight in the pocket you risk fumbling and dropping it. The worst problem I have run into was getting it a little too warm...put the hand warmers on it...and not enough time had elapsed...talk about swish swish BLOW swish swish BLOW until it went down to 100.....whew!