Is it permissible, as a type of foreplay, for spouses to smell each others private parts, and the skin around them, and also, since oral sex is a little dim and from what i know, isn't really something we should do, is it permissible to lick and suck the skin around each others private parts, all as a type of foreplay?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

It is permissible for both spouses to enjoy each other's body. Allah, The Almighty, Says (what means): {…They are clothing for you and you are clothing for them} [Quran 2: 187]

However, what should be taken into account is that sexual enjoyment should be within the limits of the Islamic etiquette and noble morals. As for what you mentioned, there is no explicit text indicating its prohibition. However, it is contrary to high moral standards and does not conform to the sound Fitrah (natural disposition) and therefore should be avoided.

Allah Knows best.