You do not need rubber gloves or the mouth valve for mouth to mouth it is advisable but not essential. How many of you have been to a night club and kissed a total stranger.
Ryanair do have first aid kits on board aproved by by IAA and in one of them I believe does have a mouth piece and gloves.
The question is now why did the crew not use them who knows state of panic we all make mistakes when we are faced with stressfull situations.