>>61259891) Drill a 2mm hole in the crotch.
2) Fill the inside with silicone caulk.
3) Powder a sewing needle with talcum/baby powder.
4) Insert powdered needle, powder lightly at the hole entrance every 2mm into the hole until you reach the end.
5) Allow caulk to cure with the needle inside.
6) Once cured, remove the needle carefully. The Powder should have kept it from bonding.
7) Enjoy!
Though, it might feel roomy for you, anon.