A tired businessman arrives to a hotel in the evening

'I need a room,' he says.

'I'm sorry, all our rooms are occupied,' says the receptionist.

'Dear God, I'm too tired to find another hotel... do you not have a free bed, at least?'

'As a matter of fact, we do. We had to give a double room to a gentleman earlier this week for a few nights. However, he's only willing to pay the price for a single bed, so he's okay with someone taking the other one. Unfortunately, he snores so loudly that no other guests could bear to share the room with him for longer than an hour. If you aren't bothered by the snoring though, we can give you the bed cheaply.'

The businessman accepts. The next morning, he walks into the lobby with a wide smile, clearly rested.

'Did you manage to sleep then?' asks the receptionist.

'Oh yes, it was wonderful!'

'Did the snoring not bother you?'

'No. I used a little trick that helped a lot.'

'Oh really?'

'Yes, when I entered the room last night, my roommate was already lying in bed. I walked up to him, gave him a kiss and said: "Have a good night, gorgeous!". After that, he sat in his bed till morning, 'cause he didn't dare to sleep!'