If your partner's penis is on the large side you may find it more than a mouthful. Blow jobs can be difficult to perform on bigger penises but don't worry - you're not expected to be able to take it all the way down.
A simple trick to blow job success is to use your hand and your mouth together - which will feel good for any size of penis. Use an edible lubricant or your saliva to get things going moving and move your hand from the shaft (bottom) to the tip until he's really hard. Then add your mouth, taking him in as your hand moves up and down.
