Sorry, your first message was ‘does the filler move with the skin’ (in general) but your second reply just implies the foreskin?
I’ll try to answer both.
When erect the filler, for me, does feel like a fatter more padded skin. But when I masturbate the top layer of skin does glide a bit over the filler but also the filler moves with it as well. I can’t really explain it. In a nut shell I can feel the filler and know it’s there.
Regarding the foreskin, there has been no migration for me (apart from when I’m floppy and that tiny bit pops up when I manually pull my skin back) . When erect I have a nice taper with no migration.
I will add that Dr. Greta said to refrain from sex for 2 weeks.
I had intercourse on day 14 and the bit by the base was still sore, and it swelled a little bit. This went the next day. I then had sex again on day 16 it was slightly less painful but swelled again (less than day 14) so I may take a little longer to heal.
I will add (and I don’t want to go into the nitty gritty) but I’m gay and a top and men are different to woman regarding tightness
so that’s why it probably hurt me a bit more.