I know I can take pegs and clips on my breasts pretty well... but not anywhere near my clit or general pussy area.
Perhaps, if you're willing to attempt it, you should try with something like a clothespin. The skin is faaaaaaar more sensitive down there than that of a breast (at least for me) i also wouldn't want metal biting through and risking cutting my poor little nub.
And in the end, some people can take clamps on their breasts, but not on their pussy and vice versa. It surely doesn't make you inadequate as a sub.