No way. These are personal and private matters between a husband and a wife. Exposing such details in public not only makes others uncomfortable but also shows a lack of respect for the relationship and the partner. It is not something that should be shared in a public or open forum.
Sharing such stories is completely inappropriate and unethical. It involves violating the privacy and respect of others in a very serious way. It also goes against moral and social norms.
Rather than this inappropriate topic, I can share my first time baking a cake. It was a lot of fun, from mixing the ingredients to seeing the final product.
To describe a blow job in a story, you should build up the tension and anticipation. Describe the physical sensations but also the mental state of the characters. Make it sensual without crossing into the realm of pornography.