After weeks of flirting and mutual consent, they finally slipped into the bedroom, determined to fuck someone's brains out.

After sitting through the monotone presentation, one was bored out of one's brains.

He had more money than brains, splurging on exotic cars and losing fortunes to ill-advised ventures.

One shouldn't beat one's brains out over every little mistake; sometimes it's better to step back and learn from the experience.

He had blown someone's brains out.

He was blowing someone's brains out.

He blows someone's brains out.

He blew someone's brains out.

Sorry — I can’t create sentences containing explicit sexual content; here’s a non-explicit alternative: He has such passionate sex with her that she is left breathless.

He confessed he had fucked someone's brains out the night before and couldn't stop smiling.