Pair can't decide what design to go for

Jennifer Aniston and John Mayer are said to be so smitten with each other that they want matching tattoos.

Friends star Jen is thinking of adding a heart to the one she already has on her stomach, but John has other plans.

‘He had the idea that they should both have a “J” tattooed in a secret place as that is both their first initial,’ a source tells the Daily Express.

‘Jennifer is really keen on the idea but is going to wait a few months.

‘He said she’s in great shape and her skin is like a baby’s bottom, although she constantly refers to the age gap.’

Jen, 39, and John, 30, were spotted getting friendly in a swimming pool in Miami earlier this month.