I can. I fellated my (now ex) 2nd husband for years. When we had sex for the first time after I was resuscitated on a ventilator (several days on a ventilator in ICU, mind you) following a suicide attempt that was a very close shave, I fellated him for, literally, hours - our older daughter came to sleep in our bed on that night, so we did not have a bed for sex, so we went into our older daughter's bedroom, and her bed (the cheapest narrow twin bed from IKEA - imagine how firm and sturdy that is! and how accommodating for two adults!) was not fit for intercourse, so he sat on the bed and I fellated him, and then we went onto the wooden floor, and I continued, and changed positions again and I continued, and on and on. For hours. And I never got tired. As you said, giving her oral sex is not a chore for you - so do not complain then! Do not expect favors in return - you said, YOURSELF, that is it NOT a chore for you. OK, great, so not a chore is not a chore and stop the pity party!

I do not give blow jobs, at all, and why would I? I am a physically lazy person who hates chores and who has trouble with running a dishwasher and doing laundry on a suitably regular basis. So no, I am with you - I hate chores. I really do. No question about that. And that is why I do not give blow jobs, or, speaking more generally, do not do any sexual "jobs" for anybody.

But if I have overwhelmingly strong feelings for a man, then I can fellate him (the difference between a fellatio and a blow job is that a fellatio is not a JOB), on my own initiative, frequently, passionately, and, in the case of said 2nd EX H who had very loud orgasms and whose whole body sort of got distorted in that final moment of the climax, I experienced "empathetic orgasms" (this is my own coinage and I am not sure it makes sense, but I will try to explain) in that I would join him in the experience. So, it was unbelievable. And also, it changed my state of consciousness - the fellating itself. So fellatios are expressions of physical love - not "jobs".

If you are expressing physical love, do you really expect anything in return?

My 2nd H gave me oral sex (from which I could not come) may be... 5 times over 12 years together. He just was not into it. His hand was superb beyond belief (I still do not have vibrators, at age 42...) so I had tons of manual orgasms, but oral sex was not his thing.

And I do not hold any grudges (I mean, I very much do, but not a propos of unreciprocated fellatios - he turned my children against me and did many other nasty things, so I am not happy with him, but I do not regret fellating him as I was expressing the feelings that I did have for him at that time, and expressing them authentically, so I have no regrets).

That was an admittedly long-winded but hopefully RELEVANT answer to your question. And, you mentioned 4 MONTHS !!!!!

And I did it for TWELVE YEARS!!!! And never felt the way you feel.