Looking for ideas or related search keywords for this condition : the male sexual partner feels nothing when penis inserted in vagina, feels good for everything else (e.g.Blowjobs, etc). at one time, the female partner able to make her vagina “grabs” the penis and the male partner feels good.

The female partner feels good whether she managed to "grab" or not. She did feels more pleasure when she able to "grab" the penis with her vagina.

But she's only able to do that at one time, and unable repeating that again the next "sessions".

Any ideas to improve this condition? Any search keywords that are a good fit for this condition?

No anti depressant, no drugs involved. Both male and female have No previous sex experience with other people.

Pardon my English.