you know your skin is porous/skin creams sink through the dermis(?) etc

Don’t be daft.

1) Skin is not porous, that’s the whole point of having skin.

2) You sprayed WD40 on your skin and did not die, that would quite possibly kill you if it got into your blood, like diesel does.

3) You can get all sorts of things on your skin and not die in the least. Do you think lemon oil or aloe vera or bloody nivea in your blood would be any less harmful than deet?

Smidge seemed good, but since my local stockist doesn’t carry it any more, I switched to Jungle Formula Natural, which you can get in Asda.
Seems fine. Even like the smell!

1) Skin is not porous, that’s the whole point of having skin.

If it isn’t – and I really don’t know – how do those nicotine and other transdermal patches work?

..and how did that fictious character die in Goldfinger when she was in the ‘nip/covered in gold huh? huh?