Men usually have several erections while they sleep at night, but they’re not necessarily related to sexual thoughts or dreams. Scientists think they might be associated with REM sleep.

Men usually have several erections while they sleep at night, but they’re not necessarily related to sexual thoughts or dreams. Scientists think they might be associated with REM sleep. 

https://www.issm.info/sexual-health-qa/is-a-lack-of-morning-erections-a-concern/?utm_source=facebook&utm_medium=social&utm_campaign=rss_hc&utm_content=952b2587-aab3-4912-9358-b9161895f2b9