blowjob for service stories?

I'm wondering if any of you have stories about receiving blowjobs (asked or offered) in exchange for some kind of service or help (not for money, so I'm excluding simple prostitution; and not as an exchange of sexual favors). Either encounters with strangers, or FWB benefit cases count, as long as the reciprocal benefits were neither sex nor money. I think I have a few which qualify.

1) When I was 29 I dated a college girl, Nicole, for a few months, but only got physical on what I think was our third date, when she asked me to her house (living with parents, who were out of town) to help her with a paper on a subject area I was very familiar with. After discussing that and giving her writing guidance for several hours, she offered to show me some pictures of facials which guys had sent her over the years and which she had been collecting. She actually never took facials herself, to this day as far as I know, but found the sight of them oddly appealing and knew that men liked them, and she and I first met online and I talked about my interest in them. She went through a bunch of them, which turned me on, so eventually my erection got uncomfortable and I took it out, which led to her sucking me (I came on her tits). While she was attracted to me, I'm not sure all this would have happened had I not offered her the academic help.

2) At 33, a Vietnamese-American woman answered my personals ad and invited me to her house. We had nothing in common, and she wasn't ever horny and seemed to get no pleasure out of sex herself, but she kept wanting me to visit whenever I could just for company. She said lovers rarely even kissed in her culture, so I asked if they ever did oral sex; this was new to her so I explained it. She was reluctant to do it, but the next time she called me I asked if she would try; she agreed. So on my next visit I soon had her kneeling in front of me and sucking my penis. She never asked for and even refused an offer of reciprocation. We had intercourse a few times too but fellatio was about 10 times as frequent. While often this was just in exchange for my company, with increasing frequency she would need a ride too and from work as she had no car, so I agreed to do that for blowjobs on each occasion. She didn't like swallowing or facials, but I would still cover her face as often as I could, and a few times make her swallow when I pumped her head up and down in the car as she leaned over from the passenger seat, usually followed by her spitting it out on the ground outside.

3) Later that year, I heard about a local swingers group; I was single then and they didn't let single men come, but I heard there were two single women in their early 20s who wanted to attend but didn't have cars, so I offered them rides. I went twice; the first time one lady didn't show and the other got there on her own, but I did give her a ride home; the second time I picked and and dropped off both. On both occasions I got blowjobs from each, and the second time came close to a double bj--they weren't on me at the same time, but were both on a bed and I moved at will from one mouth to another. No cum in their mouths or faces though (the first time another lady at the party let me cum in her mouth, the second time I actually never ejaculated). In between I did meet the second lady at my house (the one who missed the first event), and we had a 69 ending in a facial.

4) I had my purest case of bj-for-service when I was around 34, during another lull between relationships. I had a spare room which I bluntly offered for rent for anyone who could give me a bj or hj. I didn't think I'd hear anything, but one lady in her 50s did get in touch, and we met at a cafe to discuss it, then came to my house to talk about it more privately. Basically she wanted a place for occasional writing, but also to meet her lesbian lover (she was married, and her husband knew she had other lovers, but couldn't use her own home for such encounters). Obviously I wanted to test the wares so she sucked me off on the couch. While she never came over after that--perhaps she found another place that worked better for her--it was definitely the option of a service which caused this to happen.

5) At 36, I had a few dates with an Asian woman in her mid-20s who just got her law degree; while initial sexual activity was reciprocal, she never had intercourse, I think because of sexual trauma in earlier life. Nevertheless she was very sexual in other respects, enjoying time naked together and giving blowjobs. We broke up after a few months, but every week or two for months after that she would ask me to pick her up from work and come to my house for a while, almost always ending in a blowjob and/or facial, and nothing for her.

6) Later that same year I had two dates with a woman from a social group, each time she came to my house to watch a movie followed by my giving her a long backrub which she praised highly and said was sorely needed. Each time she thanked me with a blowjob, which was quite unexpected the first time; unlike most of the others, this lady swallowed easily and eagerly. We never kissed or did anything else sexual, and she never asked for anything else.