Lie down head-to-tail, either on your sides or with one lying on his/her back and the other on top. From here you can give each other oral sex at the same time.
Which bits does it work on?
Wherever the tongue and lips can reach. The mouth area is very versatile and good at giving pleasure, often more so than the genitals. For women, the clitoris gets a lot of attention, and for men, the most sensitive part of the penis, the frenulum, benefits from soft, wet and direct contact, just like the clitoris.
Who's it for?
Those who like their partner's entire body, every nook and cranny of it. Those who like to kiss, lick and caress all over. Also, for those who are comfortable enough with their own body and who can let themselves completely go and be 'tended to' by their partner.
Paula's thoughts: I like receiving and giving head but I prefer to do one after the other. When it's happening at the same time, I find it difficult to pleasure the other person and fully enjoy the pleasure I'm receiving. I tend to alternate: I give him my full attention then I let him do the same to me, then I start again. I find it easier to climax that way.