Adrian, 26, maths teacher
I think that mental pleasure matters the most: the fantasy of domination, as well as the pleasure of doing something a bit transgressive. It turns me on to see that a woman is ready to cross boundaries and do naughty things that aren't necessarily degrading or submissive, but more self-sacrificing... To intensify the forbidden side of it, do it in exciting situations, especially fleeting ones: in the car, at the cinema, etc.
Of course, it's important that the other person wants to do it. It's a bit hypocritical sometimes because the desire to do it isn't always there, but it's important that the woman shows some initiative. That's where the act can become perverse: it might be that she's not fully up for doing it, but she forces herself a little bit. On the other hand, if she really doesn't want to do it, then the blowjob won't be good. It's about finding the right balance.
One thing I love is being kissed on the tip of my penis. But using teeth is a real no-no.