You can never have too many cats...
You can never have too much fun.
You can never have too many friends or too much money.
...too many blisters in your feet.
Or on your balls. Ouch!
27 blisters on my balls is where I draw the line.
Oh... No... Not... Uhmm... Krhm... Ööh.. Not that.
You can never have too many shoes...
How many boobs....
All things in moderation.....too much is greedy. If you have too much, it's time to share.
Love a good wave....
You can never have too many heartbeats
Yes if you mean that one can have too many heartbeats all at once, that could escalate badly. But over the course of a life time, for a heart to keep beating (as in not stop), it is a good thing!
You mean like Louis in Interview with a Vampire?
You can never have to many kittens