Not in the mood for sex - masturbation then ejaculate?

Does anyone else do this? I don’t have a high sex drive so having sex 3-5 days in a row is more sex than we normally have a month! Instead of long sex sessions while trying to conceive, is it ok to occasionally have my husband masturbate / I’ll give him foreplay, and then insert him into me when he is a minute or two away from orgasming? Sometimes that feels so much easier when I’m not in the mood - especially during summer heatwaves! Thoughts? This wouldn’t be less effective, right??