Sometimes I go flaccid while having sex with my gf. Not too often. Maybe 1 in 10 times but it does happen. I never have a problem getting an erection though. Just kissing and groping usually gets me up. And I never lose it during blowjobs or while masturbating.
Usually it happens about 5-10 minutes in to a fuck and I only notice because she stops moaning.
What's this about?
Maybe you're cumming too often.
if I have sex multiple times a day for a few days in a row, I start to lose energy and have to take a break. I'll just focus on my girlfriend by eating her out etc until I have energy to fuck again.
It happens sometimes, man. Especially if you're using condoms. You're not a machine, life isn't a porno, I don't think any guy actually has a perfect 100% success rate with this stuff. I wouldn't worry about it unless it becomes a more frequent/chronic problem. Stress/anxiety are big factors here, so you could easily make it worse by worrying too much about it. Just don't treat it like a big deal when it happens, use your fingers on her to keep her warmed up and try to get had again.