Having trouble getting off from oral

I am 45 and straight but I guess the same logic applies?

I like BJs and my SO really loves performing (and see her enthusiasm/eagerness is a large part of my pleasure) so it is part of our intimacy 90% of the time.

However, I cannot remember ever having cum from this? And not with any partners before her either. I really never speculated about why but I see a lot of these post lately at Reddit on the topic. Perhaps it is because I really get of by feeling that I please my partner? Feeling her orgasm or imagining how I please her is so hot. And while she likes giving BJ as stated, she does not cum from giving me a BJ. Perhaps that is why I cannot cum either?

/r/bigdickproblems Thread