My (28F) partner (38M) is struggling to get off because of this specific thing?

I 28 F and my partner 38 M have been sexually intimate for around 4 months, but have been building a friendship and then relationship for around 2 years.

We both had numerous talks about potential sex drive differences, insecurities, etc. We enjoy one another physically and most of the time we are able to make sure we both organize.

The issue: We both enjoy when he is able to cum from sex, but he struggles extremely to cum if things are too "wet".

I have never had this issue before as I have had low sex drive/struggled to get wet with precious partners and most advice regarding sex is "wetter is better". Is there anything I can do that could make it better without it being uncomfortable in the sense of being so dry it hurts?

TLDR partner can't cum if things are too wet. Advice?

ETA: As a woman, I have sometimes had issues with masturbating because of being "too" wet which is how the conversation came up in the first place. I should have mentioned it didn't come up in a way where he was making it out like I was the problem at any point so much as just an open discussion regarding the difficulty getting off that seemed tied to specific times. He doesn't use lube when jerking off though and that will be something I will bring up, too.