No. Any kind of sex, giving or receiving or sharing should be something positive for both of you, and sucking a cock might not always make you happy per se, certainly you should feel pleased, and or contented at the very least, and yes happy lots of the time too.
Sad is bad.
So you need to consider why that is. Is it a situation you are unsure about, do you feel pressured into it, do you feel like he’s just using you for sex and doesn’t value you as a person? It could be any of those, or a lot of other reasons.
Although this is a fun, fantasy filled sex blog, I actually love to write it because I think sex is one of the most wonderful gifts we have, and getting a bit kinky with it makes it even greater. But I also think it’s incredibly powerful, and is often devalued in the way we use it nowadays.
So, I think it’d be really good for you to just think about why you’re feeling sad in these situations, and whether you need to rethink whether you need to put a bit more priority in finding things that make you feel good about yourself, and consider if you need to put more value in this powerful, amazing thing we have called sex. Don’t compromise, don’t just give it away as though it’s nothing, because it isn’t, and neither are you.
You’re amazing, sex is amazing. Save it for situations where you feel good, and loved and wanted and I think you’ll probably feel much better about it.
I hope that helps,
James