Im not sure that this should not be a new thread, but here goes :
It all depends on technique. If a lady takes the 'old fella' into her mouth, there is a huge mentally erotic event right there.
For some of us, that is enough, and we are satisfied.
However, for many of us, we need something more - and that is where the technique comes in.
If the lady takes your old fella into her mouth (with or without condom), and uses just her lips to encircle and provide sensation, then the experience can be quite boring (unless you're into the mental erotica thing !).
On the other hand, an accomplished lady can use her tongue to press your old fella up against the roof of her mouth - this is better than sex for some blokes. You can try this with your finger in your mouth - use only your lips and move your finger in and out. Then use your tongue, and see the difference.
The very best experience is only for the married (or in a long term relationship and you are comfortable that neither you nor her are sleeping with anyone else), or the daredevils amongst us (certainly not for me), where the blow job is you are silly, and during the action, after using her tongue to push the old fella up against the roof of her mouth (the palate), she then starts to really suck at it, then you are in heaven.
After writing this, I wish I was in Perth and had access to a WL !
Cheers.